Discussion Why does texture resolution affect performance?

Hello, Unity developers,

I have been wondering why it is that higher-resolution textures lead to slower performance. After all, sampling colors from an image texture is as simple as choosing coordinates and extracting the color from the image at those coordinates. From what I've heard, it might have something to do with the RAM or GPU. Can someone help answer this question, so that others can use this discussion for insight as well?

 

Assuming you are using mips, I don't think it should lead to slower performance actually.

https://forum.unity.com/threads/gpu-performance-vs-different-texture-sizes.923372/