Fix plugin packaging failure: include CustomBlueprintRenderer.h in module interface header

[GatheredSatyr53]

What changed

Added the missing #include "CustomBlueprintRenderer.h" to Source/ThumbnailToTextureTool/Public/IThumbnailToTextureTool.h.

Why

IThumbnailToTextureTool.h references UCustomBlueprintRenderer in two places:

• GetCustomBlueprintThumbnailRenderer() (line 41)
• GetCustomBlueprintThumbnailRendererInstance() (line 73)

but the header only included CustomSkeletalMeshThumbnailRenderer.h and CustomStaticMeshThumbnailRenderer.h. The blueprint renderer type was never declared in that translation unit, and there was no forward declaration either.

Why it was not caught earlier

Normal editor builds pass because UBT unity builds merge ThumbnailToTextureTool.cpp - which does include CustomBlueprintRenderer.h - into the same compilation blob, so the declaration leaks in from a neighbouring source file.

Packaging the plugin through RunUAT BuildPlugin disables unity builds, so every .cpp is compiled on its own. CustomStaticMeshThumbnailRenderer.cpp and CustomSkeletalMeshThumbnailRenderer.cpp include only IThumbnailToTextureTool.h, and both fail:

IThumbnailToTextureTool.h(41,40): error C2143: syntax error: missing ';' before '&'
IThumbnailToTextureTool.h(41,16): error C4430: missing type specifier - int assumed
IThumbnailToTextureTool.h(42,2):  error C2334: unexpected token(s) preceding '{'
IThumbnailToTextureTool.h(73,34): error C2143: syntax error: missing ';' before '*'
IThumbnailToTextureTool.h(73,10): error C2433: 'virtual' not permitted on data declarations
IThumbnailToTextureTool.h(73,85): error C2238: unexpected token(s) preceding ';'

Notes for reviewers

• One line, include-only; no behaviour change.
• Include placed alphabetically to match the existing include block ordering.
• A forward declaration of UCustomBlueprintRenderer would also compile, but the header already includes the other two renderer headers directly, so this keeps the file consistent and self-contained.
• Reported build environment: UE plugin packaging on Windows, MSVC 14.44.35207 (VS 2022).

Co-authored with Claude Opus 5.

🤖 Generated with Claude Code