Hi John ,
Please can this same 2d index mapping be used to emulate the art mapper effect using the source image.
Not at the moment. There's no concept of splitting the 2 axis modulations to allow for more than 1 color vector for the rgb mapping of an image brush. I'll think about that for the future.
Please thanks for the response. But I have seen the art mapper effect simulated in the works of some users on the forum.