This is my master piece (huge irony)
I used a GOSUB for the fills in 2D but need to change to a fill that allows me to control the outline colour.
The 3D is pure cheat in that sense I have three different “complete” geometries (GOSUB). I guess the holes in the slab can be done with a FOR … NEXT loop but that’s for later.
Thanks for all kind help?
Next venture is UI.