>>5941580Here's a tutorial for probably the simplest (but definitely not the most effective way) to create a transparency from a wall with a simple background.
First you select the background using the magic wand tool. Then you simply erase it. Thats it for making it transparent
To add a background, you generate a second layer to be the background. Then you use the brush tool with your selected color and fill in the background layer. You can then merge the layers or just save it as an image file.
>>5941591Ah sorry, I've never used GIMP but I imagine the process is pretty similar.
