Material with more than 3 layers does not appear in the game.

Can you explain a little better about this? I have all the textures in the Source sample in shared: wrap. But even so, they don’t appear in the game. Does this refer to the number of textures used which I have 16 (color, normal, roughness, AO)? It’s also a repeat thing, how can you avoid this? Removing some textures like roughness and AO?