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Screenshot glow effect problem

Hi everyone. I have FloatRGB texture where some pixels have values more than 1. If it would be emissive color in material then I got glow effect like this:

alt text

To get glow effect I try to render texture with DefaultLit material in canvas by next material and code:

alt text

     material->SetTextureParameterValue(TEXT("texture"), m_screenshot.result);
     FCanvasTileItem tile(
       FVector2D(0.0f, 0.0f),
       FVector2D(1.0f, 1.0f));

 finalTexture->InitCustomFormat(SCREENSHOT_SIZE, SCREENSHOT_SIZE, EPixelFormat::PF_B8G8R8A8, false);

     FCanvas* canvas=new FCanvas(finalTexture->GameThread_GetRenderTargetResource(), NULL, 0.0f, 0.0f, 0.0f, GMaxRHIFeatureLevel);
     canvas->DrawItem(tile, FVector2D::ZeroVector);
     delete canvas;

But finalTexture doesn't have glow effect:

alt text

What should I do?

Product Version: UE 4.18
scr45.jpg (47.5 kB)
scr44.jpg (36.5 kB)
scr46.jpg (102.3 kB)
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asked Apr 22 '18 at 10:50 AM in C++ Programming

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