You didn't mention the version you're using but in thr V5I demo I played with you could go into the I think Basic editor [the one with just 3 windows] and apply the colour map also as a bump and adjust it's height right there. Very Imagine3D like that, found it very handy with bitmap textures....

 

Once in a while I look around,
I see a sound
and try to write it down
Sometimes they come out very soft
Tinkling light sound
The Sun comes up again