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lighten mode
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Description:
Both parameters are compared to each other, the greater one is taken
(as you expected this one's the opposite to darken mode).
Completely black layers do not change the background at all (and vice versa) -
completely white layers give a white result.
Formula:
| f(a,b) = |
a (for a > b) |
| b (else) |
Advantage:
This mode is commutative (base and blend color can be swapped).
Code:
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