Sprite Atlas not using optimum size

Hey guys, my game has 32 x 32 pixel tiles. The sprite atlas Unity Pro is creating is 256 x 256. You would think 8 by 8 sprites right? It's actually doing 7 x 7 and stretching them. This makes them look muddy in the game. Is it possible to specify the atlas size, or to tell Unity not to stretch them?

 

It should not be stretching them. Instead it adds borders around your packed sprite so there are no filtering artifacts.
A 256x256 atlas will not fit 8 32x32 sprites by design.

If you think it is actually streching them, please submit a bug report.

 

It's hard to say what it's doing exactly. I'd be happy with 7 x 7 and space as long as it kept the quality the same. Here I have attached a screen grab of the atlas and the original image. It's much worse quality.


You can see there is a load of "noise" in the sprite sheet.

 

Hard to tell without seeing source assets. However it is using PVRTC compression. Try changing your source textures to RGBA and then rebuild the atlas.

 

Oh man! What a pillock I was! Thanks for spotting that. Moved to RGBA and it's all good