Short by Floppy --->
https://www.pouet.net/prod.php?which=12179
I don't know if it's a CPU problem (and it's last problematic AGA demo of all my tests at this day ). By design, there is huge screen corruption after the torus scene. The results are quite different between real A1200 (pic 1 and 2) and WinUae (pic 3 and 4).
I noticed at the end of this voluntary corruption the "famous" checkerboard encountered in "Subspace-Ubergirl" (feature not emulated). But for first part of corruption ( pic 1 ) ? Same thing ?