Nice! I tried doing a bit of demo scene stuff too (joined a group briefly) but never made anything worth releasing (the group “amour” had 4 productions but not with anything I made). I did write some fast graphics subroutines that were called from a C program. For instance, quickly put a bitmap on the screen with arbitrary x and y scaling, using fixed point numbers in assembly language. I made a scene with 3D vector balls but I had used 8 bit values for their positions so it ended up being jittery. Rewriting it was going to be too much work. Shows you the value of C where you can just change the data types and recompile. :) That book was a good foundation, and then stuff like the Michael Abrash black book later on for graphics.