Arguments:
- R,_G,_B,_opacity or
- (no arg)
Description:
Set color and opacity of selected 3D objects.
(equivalent to shortcut command col3d).
Default values:
B=G=R and opacity=(undefined).
Example of use:
$ gmic torus3d 100,10 double3d 0 repeat 7 +rotate3d[-1] 1,0,0,20 color3d[-1] ${-rgb} done add3d

Command: torus3d 100,10 double3d 0 repeat 7 +rotate3d[-1] 1,0,0,20 color3d[-1] ${-rgb} done add3d