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Expression Randomly Disables
I’m using a sampleImage expression. When I reference the R,G, or B ([0],[1], or [2]) the expression works but when I reference the alpha( [3]) it will work at first but then disable after a few seconds.
target =thisLayer;
a = thisComp.layer("Controller").effect("Sample Area")("Slider");
alpha = target.sampleImage(effect("Lens Flare")("Flare Center"),[a, a])[3];
linear(alpha, 0, 1, 0, 100)