the standard double screen modes would be slow on a vga monitor.
however, I used to use dblPal mode years ago, running in AGA HAM6 using the above WBhack. if you use systempatch and fblit, it is alot faster (especially if you have a turbo board). and imagefx would save out thumbnail icons of all my pictures in ham mode, which was cool. it was easily fast enough on an 030/50. ham8 was a bit chuggy.
can't remember if workbench backdrops were true colour though...this was just wb 3.0 however, i'll try it tommorow on 3.9. also, i didn't have 24bit dataypes back then either,they might help.
