This is as a follow-up to my previous question on artifact colors and the excellent answers provided there.
The images below show a simple example of artifact colors generated using a single bit-plane 640x200 Amiga A1000 displaying on a 1080 monitor. The top image is the RGB mode display, middle is the same image in NTSC Composite mode, and the bottom image is just a close-up to make all the artifact colors more visible.
Here is one additional photo where, instead of random dot patterns, I created varying line patterns. The pixels on the left are from a single (1-bit plane) foreground color of yellow, while the pixels on the right are from a single foreground color set to green. The background is black for both, but can obviously be modified, to yield even more colors.
Question: I am speculating that the same technique used to produce 10-bit color on the IBM CGA 640x200 display would produce 18-bit (262,144) color on the Amiga using its 12-bit native color palette and some clever Copper programming to update the two CLUT entries as needed during display. I will appreciate any answer that either validates or disputes this claim.
Additionally, I am somewhat surprised that such a high-color, low-bandwidth display mode hasn't already been used for some nifty demo on the Amiga. HAM mode animations were common, but require 3x more memory/bandwidth (320x200x6 bit-planes) than this artifact color mode would need. It seems that very smooth animation or even video playback is theoretically possible with the artifact mode. Is anyone aware of any demo or other Amiga software that ever used artifact color, or do you have any insights as to why not?