Thursday, September 27, 2012

Transparent Mask - Cycles

This tutorial is similar to the material mask, however this approach makes use of an alpha (transparency) channel built into the texture (i.e. PNG with RGBA) that will be overlayed.  In this case the red splatter (from here on referred to as blood) is an image with a transparent background.  We will be overlaying this onto a wooden plank texture.





The main point is that the Alpha output from the blood texture (top left) feeds the Factor of the Color Mix node.  In this case we had to invert it so that the transparency was set correctly.  This is probably the simplest node approach to combining materials with transparency.

The result is very nice.


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