Hello, is very common to find vfx sprites with a black background and lots of engines have a way to specify an alpha color, so all the black will be removed. Here is an example of an sprite sheet:
<img src="http://www.znelarts.com/cosas/explode_16.bmp" border="0" />
There is no way to remove the background with photoshop or any program without a loss in information, so how can I set Construct 2 to have an alpha colour to be trasparent??