I’ve noticed that sometimes when I import roughness texture (grayscale .tga), it automatically recognizes it and unchecks the sRGB checkbox. Other times it just leaves the sRGB checkbox ON. This is mainly happening when I export the texture from Substance Designer.
Is there any metadata or something else that tells UE that the imported texture should be imported as linear (such as roughness or metallic). I’m confused how does Unreal sometimes knows to turn sRGB OFF.