convert to ctg, what are the parameters

[Peter Wassink]

Im exploring refining coloring methods using the ctg layer
i noticed it is possible to convert a normal layer into a CTG layer.

And it turns out here is a limit to how many colors can be on the layer..

convert ctg layers2.PNG (3.02 KiB) Viewed 7502 times

convert ctg layers.PNG (7.58 KiB) Viewed 7502 times

After some tests it seems it has trouble with the number of pixels and not so much with the amount of colours.
in other words lines will convert better then shapes.

Another strange thing is that a single frame might convert to ctg but the whole range won't ?
again citing the: "too many colors" message.

Is there any information on what the limits are and why they are there?