i have been fighting with this for days and cant find anything with this particular issue. I'm making a texture pack and the block im having the most issues with is the grass block, of all things. i cant figure out whats causing this and how to fix it. someone, please, in laymans terms, what am i doing wrong? attached is the issue in one picture and the files/textures i have on the grass. i have done all i can and can provide more pictures but i cant for the life of me figure it out.
I see the problem, im having it too. Your grass_side.tga is a problem, it sees the dirt texture as all grass, so colours it that way. You need to make it transparent. Although i have been troubled by this too, for example what percentage?