I've been using 50x50 and png, but they come out in lower resolution in game. Anybody know why? I kept the emblem nice and simple with black and white, but I see impurities in game.
In game the emblems are 32, so make at 32x32 if you can I usually make them at 64x64 cuz bigger canvas + they resize nicely to 32x32
Anything square with a minimum size of 32x32 pixels. The degradation is due to the game auto compressing the image to a 32x32 JPG/JPEG image. If you want to see how your emblem would look in game resize it down to 32x32 then save it as a low quality jpeg.