Assuming performance is defined as the render time per frame, the answers are: True, wasted texture space does not affect performance. But it wastes memory. Mirrored UVs have no affect on performance, they save memory. Yes, it would take the same amount of time to render a tree with stacked or offset UVs. In the case of…
I have a question about how certain UV mapping techniques can affect performance. So first, as far as I know, only the parts of the texture that actually have UV mapping on them, and are therefore being rendered, will influence in-game performance. This would be the idea behind texture atlasing; having 4 models, for…
Reducing the file size of a texture is huge. That's less VRAM that has to be loaded on the GPU, and if you're using a streaming engine, that's more room for other textures to stream in at the same time / more quickly. In some cases, having a single 4k texture over (4) 2k textures can actually be worse for streaming since…