Funny, it seems that some part of my message got lost, so here are the
missing parts:
> I want to call my macro with varying objects, the object identifier is given
> as a macro argument. example:
>
> #declare result = mytraceenhancement(myobject5, <3,4,1>, <0,-1,0> ...)

#macro mytraceenhancement(obj, somepoint, somenormal, ...)
 #local resultnormal = <0,0,0>
 #local my_xyz = trace(obj, somepoint, somenormal,resultnormal)
 ... //enhancementstuff
#end

Logical, trace thinks that "obj" is the object identifier itself...

> How to tell that it is a variable?

i would like to do this like:

.... trace($OBJ, somepoint ...

but this does not work in povray, does it?

> regards,
>
> Thorben

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