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Is it right grayscale and alpha texture to stop using sRGB?

Hi.

I made grayscale sRGB texture and use it as mask in material. But engine displays "warning: mask samples texture as 'grayscale'. SRGB should be disabled for 'mask_grayscale'."

So I found it in engine source and find below in MaterialInstanceEditor.cpp

 if( Expression && ((Expression->SamplerType == (EMaterialSamplerType)TC_Normalmap || Expression->SamplerType ==  (EMaterialSamplerType)TC_Masks) && Texture->SRGB))
 {
     DrawShadowedString ...
 }
 
 UENUM(BlueprintType)
 enum EMaterialSamplerType
 {
     SAMPLERTYPE_Color UMETA(DisplayName="Color"),
     SAMPLERTYPE_Grayscale UMETA(DisplayName="Grayscale"),
     SAMPLERTYPE_Alpha UMETA(DisplayName="Alpha"),
     SAMPLERTYPE_Normal UMETA(DisplayName="Normal"),
     SAMPLERTYPE_Masks UMETA(DisplayName="Masks"),
     .....
     SAMPLERTYPE_MAX,
 };
 
 UENUM()
 enum TextureCompressionSettings
 {
     TC_Default UMETA(DisplayName="Default (DXT1/5, BC1/3 on DX11)"),
     TC_Normalmap UMETA(DisplayName="Normalmap (DXT5, BC5 on DX11)"),
     TC_Masks UMETA(DisplayName="Masks (no sRGB)"),
     TC_Grayscale UMETA(DisplayName="Grayscale (R8, RGB8 sRGB)"),
     ......
     TC_MAX
 }
 

Is this code alright? I think it's correct converting to same type.

Thanks.

Product Version: UE 4.22
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asked Jun 11 '19 at 03:10 PM in Rendering

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James.An
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