Atlas Trim Alpha not working?

[Gaudon]

Hey guys,

I have an atlas that's 21.3MB in unity with only a dozen relatively small textures. It seems to be a 2048x2048 image, when in reality a 2048x1024 would be sufficient. I have the option to Trim Alpha on, but it doesn't seem to be trimming anything..

Is there something I'm missing?

[ArenMook]

Unity does a poor job packing long or narrow sprites. For example 1000x50 image is treated as 1000x1000.

You need to take advantage of sliced sprite functionality.