[4.5 Urgent] Cant upgrade Solus, Making an FCanvas for Render Texture Crashes 4.5, Same Code works great in 4.4

Development Asset Creation
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ASolusPDaButtonMesh is a StaticMeshActor

I running all code in the Game Thread

FVector2D Dimensions is received from input parameter and you could use 512,512 as a test case

so

FVector2D Dimensions(512,512);

RenderTex is in the .h file as either

UPROPERTY()
UCanvasRenderTarget2D* RenderTex;

or

UPROPERTY()
UTextureRenderTarget2D* RenderTex;
	
FCanvas* Canvas;

Depending which version of code you are testing, the FCanvas method or the CanvasRenderTarget2D method

#Repro

Repro should be pretty easy, just have this in your .h of a static mesh extending class

UPROPERTY()
    UTextureRenderTarget2D* RenderTex;
    	
    FCanvas* Canvas;

then cpp:

FVector2D Dimensions(512,512);

RenderTex = CastChecked<UTextureRenderTarget2D>(StaticConstructObject(UTextureRenderTarget2D::StaticClass()));
RenderTex->AddToRoot();
RenderTex->ClearColor = FLinearColor(0,0,0,1); //0.2
RenderTex->bNeedsTwoCopies = false;
RenderTex->bHDR = false;

//Set pixel format to include alpha			//try 960					//floatRGBA = additive
RenderTex->InitCustomFormat(Dimensions.X, Dimensions.Y, EPixelFormat::PF_A16B16G16R16 ,  true); //linear gamma

RenderTex->UpdateResourceImmediate();

//Create New Canvas 
Canvas = NULL; 
Canvas = new FCanvas((FTextureRenderTarget2DResource*) RenderTex->Resource, NULL, 0,0,0);
Canvas->Clear(RenderTex->ClearColor);

Crash happens on the new FCanvas line

all of this in game thread :slight_smile:

Thanks!