That's nice, I never noticed that they actually released the Editor / SDK. I thought it was going to be a myth seeing that it never showed up a few weeks after release. If I was back in college where I enjoyed messing around with the latest engines and building up my portfolio, I would definitively ...

Hi and welcome! You need to save your .png file as 24-bit with transparency. You also need a shader to tell the game how you want the texture to appear in game. See the shader manual linked below. Ahh, I had tried to use a shader in case the engine was not handling the format natively, but I though...

An alpha channel/mask is a greyscale mask that sets the transparency of each pixel in an image from 0 (black) = fully transparent to 1 (white) = fully opaque. For Q3 it can only be used for TGA files, but ioQ3/QL there's the PNG format that gets rid of the need of dealing with alpha channels. What ...