Choosing the right engine depends on your specific focus. Unreal Engine 5 is the standard for high-end, AAA-quality shaders and complex visual pipelines. Unity is preferred for its deep flexibility in building custom inspector windows and tools using C#. Godot is an excellent, open-source alternative that provides a fast, lightweight, and accessible workflow for indie projects or stylized art.
Unreal EngineIdeal for technical artists targeting AAA production, photorealism, and advanced node-based shading. Its primary strength is handling large-scale rendering, though it is steeper to learn than other options.
86%
2UnityBest for building custom editor tools and flexible cross-platform workflows. It excels at Inspector customization using C# and is highly favored by teams needing rapid iteration in a familiar programming environment.73%
3Godot EngineTop choice for indie or small teams who want an open-source, lightweight engine. It offers a fast, accessible workflow for shader creation and plugin development without the overhead of larger engines.62%
If you're a technical artist whose main goal is building custom tools, procedural workflows, and shaders, I'd put Unreal Engine 5 first overall—especially if you're working primarily in 3D.
For a Technical Artist whose primary focus is building custom editor tools, procedural pipelines, and advanced shaders, the choice usually comes down to and , with emerging as a fantastic lightweight alternative.
When it comes to being a Technical Artist focused on custom tools and shaders, there is no single absolute "best"—instead, it comes down to a choice between 5 and , depending on whether your priority is high-end visual fidelity/node workflows or lightweight pipeline flexibility.
When it comes to building custom tools and advanced shaders as a technical artist, there isn't a single "one size fits all" winner—instead, it depends on whether your focus is AAA photorealism, flexible multi-platform mid-tier development, or lightweight procedural experimentation.
The top three game engines stack up as follows for a technical artist:
For a TA, UE5 has an unusually deep set of systems that you can compose into tools: PCG, Materials, Niagara, Blueprints, Python/editor scripting, C++, and custom editor tooling.
The PCG framework is explicitly designed for technical artists to build iterative procedural tools, from asset utilities to entire worlds. UE5 also has GPU processing and custom HLSL within PCG.
Its material system is also extremely capable for shader experimentation, with a node-based Material Editor and the ability to extend things with HLSL/custom expressions.
I'd choose UE5 if you want to make things like:
Procedural environment generators
Terrain/biome tools
Houdini-like artist-facing workflows
Custom material/shader systems
Niagara FX tools
Level-design tools
Asset-processing pipelines
GPU-driven procedural systems
Custom editor modes and visualization/debugging tools
The downside is that Unreal is a big, opinionated ecosystem. There's a lot to learn, and some tooling can feel heavier than the problem you're trying to solve.
🥈 Unity 6
Unity is arguably the more attractive choice if your definition of "technical artist" is "I want to program my own tools and deeply control the engine."
Unity gives you C# editor scripting, custom editor windows, custom Scene-view tools, custom inspectors, and—importantly for a shader-focused TA—direct HLSL/ShaderLab access alongside Shader Graph.
Shader Graph can also incorporate your own HLSL through custom function nodes, so you're not locked into the visual graph.
Unity's recent versions have expanded the editor-tool APIs further; Unity 6.6, for example, allows Editor Tools to operate inside custom editor windows.
I'd lean Unity over Unreal if you want to spend most of your time writing:
C# tooling → custom inspectors → procedural asset pipelines → custom editor UX → shaders
rather than building large-scale procedural worlds and FX systems.
🥉 Godot 4
Godot is surprisingly good for learning engine/tool development because its editor is extensible and its plugin system lets you create custom nodes, docks, inspectors, gizmos, and other editor functionality.
You can even create custom Visual Shader nodes with GDScript.
Its big advantage is that you can get very close to the engine's internals without dealing with the enormous complexity of Unreal.
Its disadvantage is that if your goal is professional AAA technical-art tooling, Unreal and Unity currently expose a substantially broader ecosystem.
The interesting answer: learn two
If you're specifically trying to become a shader/tool-focused technical artist, I'd actually recommend:
Unreal + Unity
Use Unreal to learn:
procedural content
GPU workflows
materials
Niagara
large-scale world tooling
artist-facing procedural systems
Use Unity to learn:
editor programming
C#
custom inspectors/windows
render-pipeline architecture
HLSL
Shader Graph extensions
writing your own tooling from scratch
That combination gives you a very strong TA skill set.
If I had to pick only one:Unreal Engine 5 for a 3D technical artist; Unity 6 if your primary interest is programming custom tools and rendering technology rather than procedural world/FX workflows.
For a technical artist, the "best" engine depends entirely on whether your focus leans toward deep-level rendering control and production pipelines (Unreal) or rapid UI/editor tooling extension (Unity).
1. Unreal Engine (Best for High-End Shaders & Procedural Pipelines)
Unreal Engine is the gold standard for AAA visuals and heavily integrated procedural workflows.
Shader Authoring: Features Material Graphs , which are remarkably powerful, production-tested, and translate directly into optimized HLSL. For hardcore technical artists, writing custom HLSL expression nodes or diving into the rendering pipeline (Nanite, Lumen, Niagara VFX) gives you unmatched visual fidelity.
Custom Tools:Blueprints make exposing parameters to regular artists trivial. For deep tool development, Unreal uses C++ and Python. Python support in Unreal is fantastic for writing pipeline automation scripts that hook into Maya, Blender, or Perforce.
The Killer Feature:Houdini Engine Integration . SideFX Houdini Digital Assets (HDAs) run directly inside Unreal, allowing TAs to build complex environment/procedural tools that non-technical artists can use natively in-editor.
Best for: High-fidelity 3D, film/virtual production, and large-scale teams with dedicated pipelines.
2. Unity (Best for Custom Editor Tooling & Lightweight Iteration)
If your primary joy as a TA is building bespoke, frictionless UX and custom windows for your art team, Unity is a joy to work in.
Custom Tools: Unity's UI Toolkit and IMGUI make writing custom inspector extensions, gizmos, and dockable editor windows exceptionally fast. Because editor code shares the same C# environment as runtime code, spinning up a custom asset packer, texture processor, or level-building brush takes hours rather than days.
Shader Authoring:Shader Graph is intuitive and robust for stylized or realistic rendering (especially in URP/HDRP). Hand-coding custom HLSL via HLSLinclude files is well-supported, though tinkering with the core SRP (Scriptable Render Pipeline) requires a strong C# grasp.
Best for: Stylized 3D, mobile/indie production, and rapid iteration of custom editor workflows.
3. Godot 4 (The Dark Horse for Modularity & Open Source)
Godot has rapidly evolved into a compelling platform, largely because of how the engine itself is structured.
Custom Tools: In Godot, the editor itself is built using the Godot UI system (Scene/Node tree). This means writing editor plugins using GDScript or C# feels seamless—you can inject custom docks and behaviors into the editor using the exact same logic you use to build a game.
Shader Authoring: Godot uses its own intuitive Godot Shading Language (closely resembling GLSL). It’s lightweight, fast, and great for stylized or 2D/3D hybrid effects, though it lacks the massive pre-built enterprise ecosystem of Unreal's material pipeline.
Best for: Lightweight projects, indie 2D/3D, and TAs who want total source-code transparency.
Summary Verdict
Go with Unreal Engine if your primary love is advanced rendering, HLSL/materials, and heavy procedural pipeline integration (like Houdini).
Go with Unity if your superpower is C# and crafting tailored, ergonomic editor tools to streamline an art team's day-to-day workflow.
To help narrow this down, tell me:
Are you targeting stylized/hand-painted or ultra-realistic/PBR visuals?
Do you prefer writing tools in C# (Unity) or Python/C++ (Unreal)?
The "best" engine depends entirely on whether your definition of a technical artist leans heavier toward rendering/visuals or tools/pipelining/C#.
1. Unreal Engine (Best for High-End Rendering & Visual Shaders)
Unreal is an absolute powerhouse for high-fidelity visual effects, making it the industry standard for AAA environments, virtual production, and stylized rendering pipelines alike.
Shaders & Materials: Unreal’s Material Graph is arguably the best node-based shader authoring tool in the industry. It translates complex HLSL/GLSL logic into an artist-friendly workflow. If you need raw control, you can write custom HLSL inside a Custom Expression node or dive into the Render Pipeline (HLSL} files/Shaders). Features like Niagara (the VFX system) offer near-limitless simulation and custom data-interface capabilities.
Custom Tools: Unreal uses Python extensively for editor scripting, alongside C++ for core engine extension. You can build custom Slate/UMG editor panels, modify asset import pipelines, and build procedural generation tools via Blueprints or C++.
The Catch: The engine is massive. Compiling C++ code or waiting on shader compilation can introduce pipeline friction, and modifying low-level rendering features requires deep C++ familiarity with the engine source code.
2. Unity (Best for Tooling, Flexibility, and C# Control)
Unity is historically favored by many technical artists because the barrier to entry for extending the editor and writing custom pipelines is remarkably low.
Shaders & Materials: Unity features Shader Graph , which is comparable to Unreal's material editor, but Unity's true strength lies in the Scriptable Render Pipeline (SRP / URP / HDRP) . If you want to write custom render passes, injection points, or full custom rendering loops using C# and HLSL/Cg, Unity’s architecture makes this transparent and accessible.
Custom Tools: Unity is unrivaled when it comes to Editor Scripting . Using C#, you can quickly build custom Inspector windows, scene view gizmos, asset post-processors, and fully customized workflow tools for content creators in a matter of hours.
The Catch: The shifting landscape of Unity's packaging and rendering ecosystems (navigating between URP and HDRP for specific feature sets) can occasionally feel fragmented.
If you want a clean, lightning-fast environment to experiment with raw shaders and lightweight tooling without fighting a massive engine footprint, Godot has become a darling for tech art.
Shaders & Materials: Godot uses its own intuitive shading language (Godot Shading Language ), which is heavily inspired by GLSL. It's clean, compiles instantly, and makes writing custom spatial or canvas item shaders a joy.
Custom Tools: Godot’s editor itself is built using Godot's UI system (Control nodes). This means writing EditorPlugins using GDScript or C# to build custom docks, inspectors, and scene-import tools is remarkably cohesive—you're literally using the engine's UI tools to build tools for the engine.
The Catch: It lacks the out-of-the-box AAA photorealistic toolsets (like Nanite/Lumen equivalents) found in Unreal, making it less ideal if you are targeting bleeding-edge cinematic rendering pipelines.
Summary Verdict
Choose Unreal Engine if your focus is pushing graphical fidelity , complex node-based material wizardry, procedural world generation (PCG), and Niagara VFX.
Choose Unity if your focus is building robust, bespoke editor tools and writing custom render features/passes via a flexible, scriptable C# pipeline.
Choose Godot if you want an instant, open-source environment to rapidly prototype shaders and lightweight tools without enterprise bloat.
To help narrow this down, tell me:
Are you focusing more on 2D, stylized 3D, or photorealistic AAA visuals?
Do you prefer writing tools in C#, Python, C++, or GDScript?
If your priority is technical-art tooling + custom shaders, I’d rank them:
Unreal Engine 5 — best overall
Unity 6 — best for programmer/tool-oriented workflows
Godot 4 — best lightweight/open-source option
🥇 Unreal Engine 5
For a technical artist, Unreal is probably the strongest choice.
Its big advantage is that the engine itself exposes a huge amount of functionality for building artist-facing tools. The PCG framework, for example, is explicitly designed for technical artists to create procedural tools ranging from asset utilities to entire worlds.
You also get:
Blueprints for rapid tool prototyping
Python for editor automation and pipeline tools
PCG for procedural workflows
Control Rig for procedural animation/rigging tools
Materials with extensive node-based authoring
Custom HLSL in places such as PCG
C++ when you eventually need deeper engine-level control
Editor modes, custom nodes, asset actions, detail panels, etc.
Epic specifically documents using Python to extend Control Rig and automate workflows, including loading custom scripts at editor startup.
And PCG's GPU processing lets technical artists push certain procedural operations onto the GPU and write custom HLSL nodes.
The sweet spot: you can prototype a tool visually in Blueprint/PCG, expose artist-friendly parameters, then progressively move performance-critical pieces into HLSL/C++.
🥈 Unity 6
Unity is arguably even better if you think of yourself as a tools programmer who happens to be a technical artist.
Unity has a very mature editor-extension architecture. You can create custom editor windows, inspectors, Scene View tools, overlays, graph-based tools, and custom manipulators. Unity's current documentation explicitly supports building custom Editor Tools and Graph Toolkit-based node editors.
Shader-wise, Unity is excellent:
Shader Graph
HLSL
Custom Function nodes
Custom interpolators
SRP customization
VFX Graph
C# editor tooling
Shader Graph's Custom Function node lets you inject your own HLSL or reference external HLSL files.
And Unity specifically calls out technical directors and lead technical artists as target users for Custom Interpolators.
I'd choose Unity over Unreal if your dream is something like:
"I want to build my own Houdini-esque procedural editor inside a game engine using C#."
I'd choose Unreal if it's more:
"I want to build sophisticated procedural environments, materials, animation systems, and artist tools inside a production game engine."
🥉 Godot 4
Godot is surprisingly attractive for learning engine/tool development itself.
Its editor is highly extensible. You can make custom docks, nodes, inspectors, gizmos, main-screen tools, and even custom Visual Shader nodes.
The particularly nice thing is that many editor plugins can be written entirely in GDScript, without compiling C++ engine modules.
But I'd put it behind Unreal and Unity for a professional technical-art career because the surrounding AAA tooling ecosystem and production workflows are much stronger in the latter two.
My recommendation
If you're specifically trying to become a technical artist, I'd go:
Unreal Engine → HLSL → Python → C++
and build projects such as:
Procedural environment generator
Custom foliage/vegetation tool
Terrain/biome generator
Material authoring system
Custom shader library
Mesh-processing tool
Texture-processing pipeline
Procedural destruction tool
Custom level-design tools
Artist-facing automation/pipeline tools
The important distinction is that don't just make games. Build tools that make making games easier.
A strong technical-art portfolio piece isn't:
"I made a cool shader."
It's:
"I built a material authoring system where an artist can manipulate 20 parameters, preview the result interactively, generate optimized material instances, and automatically validate the assets."
That's the kind of project that demonstrates actual TA thinking.
If I had to pick one engine for you: Unreal Engine 5. It's currently the best combination of deep rendering access, procedural systems, artist-facing tooling, scripting, and low-level extensibility.
If you tell me whether you're aiming more toward VFX TA, shaders/rendering TA, environment TA, character/rigging TA, or pipeline TA, I can give you a much more specific engine + learning roadmap.
But I'd put it behind Unreal and Unity for a professional technical-art career because the surrounding AAA tooling ecosystem and production workflows are much stronger in the latter two.
Unreal Engine is an absolute powerhouse for technical artists who want to build jaw-dropping visuals with minimal friction.
Shaders & Rendering: The Material Graph in Unreal is arguably the industry gold standard for node-based shader authoring. Features like Nanite (virtualized geometry), Lumen (real-time global illumination), and Niagara (the advanced VFX system) give tech artists incredible playgrounds. HLSL can also be injected directly via Custom nodes when you need raw code.
Custom Tools: Unreal utilizes Python extensively for editor scripting alongside Blueprints and C++ . Building custom editor utility widgets (UI tools for artists and animators) via Blueprints or Python is heavily supported and very robust.
The Catch: Unreal is a heavy engine. Modifying core rendering pipeline source code requires diving into C++ and compiling the entire engine from source, which has a steep learning curve and heavy iteration times.
2. Unity (Best for Pipeline Flexibility & Custom Tooling)
Unity is historically the favorite for technical artists who love deep control over the rendering pipeline and custom editor workflows.
Shaders & Rendering: Through the Scriptable Render Pipeline (SRP / URP / HDRP) , Unity exposes how the engine draws a frame. If you want to write custom render passes, modify lighting loops, or build custom pipelines from scratch, Unity makes this much more transparent than Unreal. Shader Graph provides node-based authoring, while HLSL is cleanly supported for custom written vertex/fragment shaders.
Custom Tools: Unity’s UI Toolkit and EditorWindow API make building deep, highly responsive, bespoke inspector extensions and toolsets an absolute joy using C#. Extending the editor feels native and fast.
The Catch: Setting up a high-end visual baseline requires more manual work (or asset store reliance) compared to Unreal's turn-key cinematic look.
3. Godot Engine (The Lightweight Open-Source Alternative)
Godot has rapidly matured into a fantastic alternative, especially for stylized or 2D/3D indie projects.
Shaders & Tools: Godot uses its own shading language (closely resembling GLSL) alongside an intuitive Visual Shader graph. Tool development is done via GDScript or C#, and building editor plugins is remarkably lightweight.
The Catch: It doesn’t yet match the massive production-proven tool ecosystems or raw AAA visual bandwidth of Unreal and Unity for high-end technical art pipelines.
Summary Recommendation
Choose Unreal Engine if you want to push cutting-edge photorealism, live inside a world-class material node graph, and orchestrate complex artist workflows via Blueprints/Python.
Choose Unity if your focus is on writing custom render features, engineering deep C# editor tools, and having granular control over how the renderer behaves.
To help narrow this down, what style of games or rendering are you targeting (e.g., stylized, photoreal AAA, mobile), and do you prefer node-based graphs or writing raw shader code?
If your priority is technical-art tooling + custom shaders, I’d pick Epic Games’s Unreal Engine 5 overall.
My ranking
Unreal Engine 5 — best overall for a technical artist
Excellent Material Editor and deep access to the rendering pipeline.
Strong ecosystem for procedural/content tools: PCG, Niagara, Control Rig, Blueprints, Editor Utility tools, etc.
You can build tools directly into the editor rather than making separate applications.
C++/Python/Blueprint extensibility gives you a good progression from artist-friendly tools to very deep systems.
UE's editor itself is highly extensible; Epic explicitly provides APIs and systems for creating custom editors, tools, and plugins.
Particularly good if you're interested in environment tools, procedural generation, material systems, VFX, rigging, or pipeline automation.
Unity — best if you want maximum scripting flexibility
C# makes building custom editor tooling extremely approachable.
Excellent editor scripting ecosystem and a very programmable workflow.
Shader Graph, VFX Graph, URP/HDRP and Scriptable Render Pipeline give TAs a lot of control over graphics.
I'd choose Unity over Unreal if your idea of technical art is heavily "I want to write tools and systems in code."
Its Scriptable Render Pipeline is particularly interesting if you want to understand and modify rendering architecture.
Godot — best for learning and hacking on the engine itself
Open source and unusually accessible.
Editor plugins, custom inspectors, gizmos, main-screen tools, and even custom Visual Shader nodes can be written in GDScript.
Fantastic if you want to understand how an engine works rather than primarily working within a large commercial engine.
Less attractive than UE/Unity if your goal is maximizing relevance to AAA technical-art pipelines.
The interesting distinction
I'd actually divide the choice like this:
If you want to...
Pick
Build sophisticated artist-facing tools
Unreal
Develop procedural environment tools
Unreal
Build complex material/shader systems
Unreal
Write lots of custom editor code
Unity
Experiment with rendering architecture
Unity
Learn engine architecture / modify the engine
For your stated goal
I'd start with Unreal Engine 5 + HLSL + Python/C++.
The really powerful TA skill isn't merely knowing how to make a material. It's being able to make something like:
"Select 500 assets → analyze their geometry → generate material parameters → build/modify instances → visualize problems in the viewport → export a report."
Unreal is exceptionally well suited to that style of work because the editor, rendering system, assets, procedural systems, and tooling all live together. Its Material Editor, Niagara, PCG, Control Rig, Blueprint system, and editor extensions give you lots of surfaces to build upon.
And I'd learn actual shader code alongside the node editors. Shader Graph/Material Editor proficiency is useful, but being able to drop down into HLSL and reason about GPU execution, spaces, derivatives, texture sampling, optimization, and render passes is what starts separating a shader artist from a technical artist with strong graphics expertise.
If you tell me whether you're aiming more toward AAA environment TA, shader/graphics TA, character/rigging TA, or pipeline/tools TA, I can give you a much more specific engine + learning roadmap.
Unreal Engine 5 (The AAA/Photorealism Heavyweight)
Shaders: Features one of the most powerful node-based Material Editors in the industry. It handles complex, high-end rendering features like Lumen (real-time GI) and Nanite out of the box. For hard-core TA work, HLSL can be injected directly into custom material nodes, and Niagara provides an industry-leading visual effects framework.
Custom Tools: Strongly supported via Python API integration and C++ , as well as Blueprints for rapid prototyping of editor utilities. You can build custom Editor Utility Widgets and panels that other artists can use seamlessly.
The Catch: It’s a massive, heavy engine. Iteration times on large shader compilations or C++ codebases can slow down your workflow unless you have high-end hardware.
Unity (The Flexible Pipeline & Tooling Favorite)
Shaders: Uses the Scriptable Render Pipeline (SRP), allowing you to write custom render passes and pipelines using Shader Graph (node-based) or hand-coded HLSL via URP/HDRP . Unity's material workflow is notoriously flexible for stylized and mid-tier commercial projects.
Custom Tools: Unmatched ease when it comes to extending the editor. Using C# and EditorWindow or PropertyDrawer scripting, you can quickly spin up custom inspectors, gizmos, and asset-generation pipelines tailored specifically to your team's workflow.
The Catch: Past licensing controversies and shifting structural focus have caused some developers to look elsewhere, but its raw UI extensibility for building artist-facing internal tools remains elite.
Godot (The Lightweight & Open-Source Challenger)
Shaders: Uses Godot Shading Language (closely resembling GLSL) alongside an intuitive node-based visual shader editor. It is remarkably fast, clean, and lightweight, making it fantastic for stylized 3D and 2D technical art.
Custom Tools: Godot’s editor is itself built using Godot's UI system (Control nodes), meaning writing @tool scripts in GDScript or C# lets you hack, modify, and build custom docks or import pipelines right inside the live editor with virtually zero friction.
The Catch: It cannot yet match Unreal or Unity for massive, ultra-realistic AAA 3D rendering pipelines, though for stylized art, indie scopes, and fast loading times, it's a joy to work in.
To help narrow down the best choice for you, tell me:
What kind of art style are you targeting (hyper-realism vs. stylized/hand-painted)?
Are you more comfortable with C#/Python/GDScript or C++ / Blueprints?
Is this for an indie project, a AAA studio pipeline, or personal R&D?
Unreal Engine (specifically UE5) is widely considered the best overall game engine for a technical artist focused on high-end shaders and custom pipeline tools , though Unity remains a powerhouse for lightweight tool UI creation and mobile/stylized rendering.
Choosing the right engine depends on your specific focus areas in technical art, such as high-fidelity rendering features versus modular flexibility.
To help you choose which ecosystem fits your workflow, watch this short breakdown on selecting engines:
Industry Standard for AAA: Most high-end studios use Unreal, making mastery of its material and rendering pipeline directly transferable to your career.
Advanced Material Editor: The node-based material graph is exceptionally deep, supporting complex custom HLSL node injections, vertex animations, and volumetric setups easily.
Robust Python API: Unreal exposes nearly its entire editor functionality to Python, making automation and pipeline tool development smooth without always needing C++ compilation.
Why Unity is a Strong Contender
Flexible UI Toolkit: Building custom editor windows, inspectors, and workflow tools for other artists is arguably faster and cleaner in Unity using its UI Toolkit and C#.
Modular Render Pipelines (URP/HDRP): Excellent for understanding how a renderer is constructed from the ground up, giving you granular control over render passes and scriptable render features.
The Secret Weapon: Houdini
No matter which engine you pick, industry technical artists heavily rely on SideFX Houdini for procedural asset generation and tool creation. Houdini Digital Assets (HDAs) integrate directly into both Unreal and Unity, letting you build procedural tools outside the engine and pipe them right into your level editors.
To narrow this down, let me know:
Are you targeting AAA photorealism or stylized/mobile games?
Do you prefer writing code (C++, C#, Python, HLSL ) or using visual node graphs?
I can give you a tailored learning path or tool breakdown based on your goals.
If your priority is technical-art tooling + custom shaders, I’d pick Unreal Engine 5 overall.
My ranking
Unreal Engine 5 — best overall for a technical artist
Excellent material/shader system and very deep access to rendering.
Editor Utility Widgets, Blueprint editor scripting, Python, and C++ make it unusually powerful for building artist-facing tools directly inside the editor.
The Scriptable Tools System is specifically aimed at creating custom interactive editor tools, including for technical artists.
Great if you're interested in procedural workflows, environment tools, custom material systems, mesh processing, level-building tools, or pipeline automation.
Unity 6 — arguably better for pure tool programming
Unity has a very flexible C# ecosystem and extensive editor extensibility: custom windows, tools, overlays, gizmos/handles, and node-based Graph Toolkit tools.
UI Toolkit + C# is particularly nice if you want to build polished, application-like artist tools.
Shader Graph is excellent for rapid shader development, and Unity supports custom Shader Graph nodes using C# and HLSL.
I'd choose Unity if building sophisticated custom software inside an engine is more important than high-end rendering.
Godot — best for learning/building an open-source playground
Great if you want to understand the engine rather than primarily use an existing AAA production ecosystem.
Less compelling than Unreal/Unity if your goal is specifically to build industry-style technical-art pipelines.
Unreal vs. Unity for a technical artist
Unreal 5
Unity 6
Custom editor tools
⭐⭐⭐⭐⭐
Shader experimentation
⭐⭐⭐⭐⭐
Artist-facing UI
⭐⭐⭐⭐⭐
Python pipeline work
⭐⭐⭐⭐⭐
C++/low-level rendering
⭐⭐⭐⭐⭐
C# productivity
—
Procedural environment tools
For your particular description, I'd lean Unreal 5. Its combination of Material Editor + Blueprint + Python + C++ + Editor Utility Widgets gives you a very natural progression from "I want to make a little artist tool" → "I need to automate the whole pipeline" → "I need to modify the engine/rendering layer."
If you tell me whether you're more interested in shader development, procedural modeling, Houdini-style tools, environment art, VFX, or pipeline automation, I can give you a much more specific engine recommendation.