Hi,
   I'm not sure if this goes in the advanced category or not, but I'm having
a problem. I trying to make a snow casting macro, and for this I using
nested loops, but I don't want to have a blob created if a collision isn't
made so here is the conext:

[code]
#declare trval = trace(Objapply, coords1, coords2, <0,0,0>);
#if(trval != <0,0,0>)
....
#end
[/code]

It highlights the #if line and comes up with
"Parse Error: Float expected but vector or color expression found."

and If I change the expression to "(trval != 0)" It does the same thing.

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