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1. Substance Painter 2018.2.1 - .tga normal map export artifacts

   

   

   Topic by IDCrisis0 · Aug 2018 · Home› Adobe Substance

   Hey all, I know I'm probably just missing something obvious here, but I'm getting some artifacts in my normal map when I export as 8bit .tga or .png. In the past I haven't had this problem, and I need the .tga for UE4. I've tried a 16bit .png and the artifacts are not showing up. Has anyone else run into this issue?…

2. Re: Substance Painter 2018.2.1 - .tga normal map export artifacts

   

   Reply by IDCrisis0 · Aug 2018 · Home› Adobe Substance

   Thanks, @oblomov that's exactly what I was looking for! Looks like adding dithering is what I'll need.

3. Re: Substance Painter 2018.2.1 - .tga normal map export artifacts

   

   Reply by oblomov · Aug 2018 · Home› Adobe Substance

   It's a typical quantization issue. For such a smooth surface, you would need either to add edge loops to get rid of the smooth gradient on the flat side of the sword, or use a 16bpc normal map, or add dithering on the normal map. See https://polycount.com/discussion/148303/of-bit-depths-banding-and-normal-maps