I think Multiply returns A if either A and B are less than 0, or at least this is what the tooltip suggests.  You can use the MergeExpression node to do what you need.

Steve

Ben Pierre wrote:
hey all,

I just plugged the same 3 channel, RGB image to both A & B inputs of a
Merge(A,B) node, set operation to multiply....(ie: image^2).

The image has both positive and negative values.... the result has both
positive and negative values?!

I feel like I've taken crazy pills!.. (I would expect all values to be
positive)..... What kind of "Nuke try and help me out, without me
asking..because I can't help myself" mathematics is going on here?

-Ben Pierre

  

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