Will an exported game use more memory if I would use the same texture on more surfaces? Let’s say I have scene with 1024x1024 texture and I use it on only one plane and then I have scene which uses same texture but on 4 planes. Will the second scene use more memory(or maybe have lower performance)? Or is the texture loaded “only once”?
Texture is loaded only once. You’ll also want to use the same Material, which will allow for Dynamic Batching to occur, making what would be 4 draw calls into 1 (it’s a per material basis).
tl;dr Yes, but you want to use as few materials as possible.