@_iPhoenix_ can you explain in detail how the minimap is used to project the 3D image? Seems pretty interesting/clever for TI-BASIC.
As for increasing speed, i heard Lists are faster than Matrixes, but i may be wrong. ALso since you use the minimap to project it probably won't make an improvement.
Yes. I draw the minimap, then used pxl test, at different angles for the raycasting.
And a code golf is where users try to shorten or speed up a section of code, in a competitive fashion.
Golf: smallest score wins
Code Golf: smallest size/time wins.