[joosters]

Wow, that example parrot image is pretty impressive, given that it is just three colours, and I'm viewing it on an LCD!

I never knew anyone had tried that before on a spectrum. At first I thought you were just talking about the other trick, getting more than 2 colours per 8x8 by changing the palette as the raster scanned down the screen. The multi-colour parrot is way more adventurous!

I'd love to see the parrot image on an old CRT to get a feeling for what the effect might look like with the phosphor afterglow. Leaving the spectrum behind and using a bigger palette range, like on the ST, the effect seems much less epileptic fit inducing, because you can pick closer colours to switch between.