Texture Atlasing and Tiling Texture questions

jordank95

Can someone clear something up for me? If Im using a majority of tiling textures and trim sheets in my game, how does texture atlasing come into play here? 

Also, all of my tiling textures are authored at 2k resolution and my meshes are scaled to match my texel density I have determined. Am I doing this correctly? I have a few tiling textures that Ive downscaled to 512, but the vast majority are rendering at 2k each and I use about 10-15 or so on screen at a time. Is this the optimized way to do this?

Eric Chadwick

The only way to know is to profile it, on your target hardware.

jordank95

Eric Chadwick said:

The only way to know is to profile it, on your target hardware.

Right, but my main question is, is this the general workflow with tiling textures? Also, how does atlasing work if Im mainly using tiling textures?

Eric Chadwick

Atlasing is usually for hero models and props. Also useful for lightmaps. You may not need either.

But most games use a mix of atlases and tiling, so that would be 2 uv channels.

Eric Chadwick

You can even get clever and use only a single atlas uv, then scale/tile your textures in the material instead of scaling the UVs. That way you could mix atlas textures and tiled textures, but using a single uv.

poopipe

A trim sheet is a texture atlas.

Honestly, stop worrying about it. 
If you make things in a way that minimises the amount of unique assets you have to create then you have almost certainly made something that's fairly efficient. 
Any performance gains or issues  to be found beyond that are entirely dependent on context and can only be answered by profiling