Using tiling and non-tiling textures

In a video game there is often a choice made between tiling and…non-tiling textures.…The difference in those is fairly straightforward.…Tiling textures are made to repeat from end-to-end, top to bottom and side-to-side.…An example of a place for a tiling texture would be this ground plane or…whatever is going on here.…It is very likely we want a cracked worn asphalt pattern to simply wrap…around the building;…we're using non-tiling textures for the building.…As an example, right here at the top I can see an obvious repeat, this is not…tiling correctly, in that I've got stacked UVs.…

However, there's other places where I'm tiling quite nicely, right here in the…window units as an example.…If you ignore this small corner post I need to unwrap, or hit with a solid white…color, we can see that one window unit is actually repeating very nicely next to the other.…I've gone over in Photoshop and updated that PSD a little bit, I'll bring it in…and see if that helps in the tileability just a bit.…Here in Photoshop, what I've done is I've taken my Diffuse_start.psd and I've…