I'm new to extension building and I'm beginning work on an extension. Concerning icons for the panel, I've found that you need a normal, rollover, dark normal and dark rollover but I can't find any documentation that mentions the appropriate sizing and if there are separate assets needed for retina screens. Does anyone know what sizes work best and/or how to handle retina assets?
Note: I have seen this discussion on the subject, but am not sure how to have multiple icon sizes as mentioned: http://forums.adobe.com/thread/718055
In the spirit of experimentation, I've found that 46x46 appears to work quite well. If anyone else has any commentary or experience feel free to chime in.