Hello Unreal World, trying to develop a project targeted at Android. And I found this square blur artifact on mobile. After several tests, I can narrow it down to ASTC compression of normal maps on mobile.
Already tried using the highest quality and other compression methods but the issue still exists. Then I came by some threads discussing the compression settings and I tried using HDR compress instead of the default normal map compress and the problem is gone. In renderdoc the normal map used stills shown in ASTC format.
Could anyone shed some light on this? Cause I’m not sure if this should be the correct settings to use and what impact it may have on performance. Here is the ASTC settings I used.
