I've been creating some pavement/road textures and everything's been going fine until i find this ingame: http://steamcommunity.com/id/grazr/screenshot/559789468023701284 This texture is using an official ssbump and heightmap, though the texture itself is custom. The vtf is a clone of the original except with a re-assigned base texture so that i can find it in the texture browser easier. Not sure why these black squares are showing up (cubemaps are built) since i am otherwise using Valve's own vmt settings for this texture. http://steamcommunity.com/id/grazr/screenshot/559789468023699736 On my custom texture with a custom ssbump (but without a height map) i get this weird thing. http://steamcommunity.com/id/grazr/screenshot/559789468023700601 Up close the "weird thing" isn't apparent and the texture looks relatively normal, like how i'd like it. I've been using ssbump generator, i've heard it's not very good for generating normal maps, but the images don't seem to have any aesthetic issues when generated; and i don't wanna fork out money for crazybump since i'm not a student anymore and am not eligable for an educational license. EDIT: I've fixed the black squares, now i just need to figure out those weird little blotches which are presumably coming from the ssbump map. EDIT2: If it makes any difference, i haven't rendered the bump maps with occlusion, mostly because my heightmap is poopoo. But surely that wouldn't result in this kind of error? That just affects shadowing within the texture.