First of all I must say I have missed this community a lot and it's good to be back. Second, sorry for this 'strange' title I've chosen, but probably after you'll read the content you shall understand what's it about.
So, I'm working on some stuff and I'd like to use sprites from CS2D, but also user-made. ( of course giving credits ) Now, the problem : Not all sprites are placed on a transparent background, since some users use masks in the editor. Therefore, I'd like to ask you how to use Photoshop to remove those black, white or magneta backgrounds. For example, go to your sprites folder and open the default tree sprite. It's a white tree on a black background. I'll replace the white color with a green of course, but I need to get rid of that black background first.
If you know how it's done, I'd appreciate your help.
Thank you,
Mapmaker.