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How Does It Work?
The color ADD component separately adds the red, green, and blue values of its two parameters together. Adding two bright or saturated colors together often results in pure white since the
maximum RGB values have all been reached.
The percent ADD component simply adds the two percent parameters together but never exceeds 100%. As with the color ADD component, two percents can often add up to pure white.
The bump ADD component is probably the most useful type. It adds the two bump parameters together but is unbounded. It's great for adding different scales of detail together into a single bump. For
example, you can add some FRACTAL noise to another bump texture to "rough it up".
Hints!
Linking only the A parameter to another texture and adjusting the value of the B parameter in the component editor is a good way of making minor adjustments in bump elevation to a single texture or a
whole subtree. This is most often useful when matching bump scales in the creation of a bump map.
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