Creating a texture atlas
The real hang up I am having with this process is the dimensions for when I bake to the texture sheet. I've already made a few texture sheets, making sure the models are snapped to the grid before I bake to the texture sheet. However, the high poly pieces are on the grid while their dimensions are not of a power of 2 in length. One sheet has 4 trim pieces with dimensions 120x256, 24x256, 24x256, and 88x256. Does this matter or does everything have to be on the grid and of a power of 2 dimension? So I'd change the hp pieces to be 128x256, 32x256, 32x256, 64x256. My hunch is that having the power of 2 dimensions is best because they're more interchangeable together, but I'm not wholeheartedly sure. I've used the first situation so far and haven't run into any issues yet. Plus, when you make props you're not making them to match the dimensions and are just worried with fitting on the grid in general.
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Atlas textures are in my opinion a pain in the ass but to answer the question only the texture itself has to be power of 2, within it you can use it however you like but should you ever want to separate stuff from the sheet it might make sense to at least keep it as close to power of 2 as possible. If that's not a concern then go to town
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