ASTC for normal maps

心不动则不痛 提交于 2019-12-11 15:45:17
问题 I am trying to compress my normal map textures, so I am using ASTC 4x4. It works completely good for other textures (aka diffuse), but quality lost for normal maps were too big. Is there a way to improve ASTCs quality directly for Normal Maps ? I have tried to use -normal-psnr flag, but it makes my texture greyed (instead of normal blue) ASTC normal map: PNG normal map: 回答1: Compressing normal maps using a normal mode in the reference encoder stores normal maps as X+Y maps. X is stored in the