It6 looks like your repository starts with the same script with the black background I listed. I didnt create it (So you added a duplicate with "Burr's Version")

The original discussion where this came in was with "Ambimind" in this thread here:

https://moi3d.com/forum/index.php?webtag=MOI&msg=1049.1

With his desire to create a rendering with controls of the output and an "Alpha Channel"