UE Materials and Rendering

Target engine: UE 5.8. APIs below are verified against the 5.8 headers; older forms are listed under "Deprecated — do not use".

Runtime material and rendering C++: UMaterialInstanceDynamic, UMaterialParameterCollection, UTextureRenderTarget2D, USceneCaptureComponent2D, FPostProcessSettings, UDecalComponent, plus the 5.8 renderer features (Nanite, Lumen, MegaLights, Substrate, Virtual Shadow Maps, TSR). Material headers live in Runtime/Engine/Public/Materials; render targets, scene, post-process volumes in Runtime/Engine/Classes/Engine; Blueprint libraries in Runtime/Engine/Classes/Kismet. Build.cs: "Engine" covers everything above; add "RenderCore" and "RHI" only for EShaderPlatform, RDG and global shaders.

Context

Read .agents/ue-project-context.md if it exists (module names, conventions, enabled plugins, renderer settings). Do not stop if it is missing.

Identify the area from the request and the codebase. Ask only when two plausible readings would produce different code.