Thanks for your reply, I try out this bitmap way. but I have to create a plane in the size of the image texture to display and check the effect, or I have to guess the position changing trendency, and the bitmap node needs filename input.
How could I scale the plane to larger size there to maintain the correct interactive effects? Is there UV map node for this?
And the bitmap is on XY plane by default, how could I change it to XZ plane so I can do rigid body drop down effect.
As I download your attachment pos_to_color.c4d I see you use procedure fusion texture for the color texture, how could this ball's color responses to the color spectrum there? Any xpresso node for that?
I also have no idea how to handel with
Could you show me the ways please?
Thanks again.