This is a shader cache error. Go to your phone storage > Android > Data > com.rockstargames.gtasa > Files. Delete the "cache" folder. Restart the game. The game will rebuild the shaders correctly.
Installing these APKs requires caution. You are modifying game files. Follow this step-by-step guide to avoid bugs. Gta San Andreas Best Graphics Mod Apk -UPD-
Textures not loading properly after installing mods : r/sanandreas This is a shader cache error
: A heavy overhaul aimed at mimicking the aesthetic of GTA V with realistic light casting and high-definition vehicle textures. Gta San Andreas Best Graphics Mod Apk -UPD-