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Showing results for tags 'operation'.
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DocWhite posted a topic in CompositingHello people! I came across a thing I still cannot figure out why it happens. If we perform an ADD operation using VEX of an image, and the original image in pixel (483, 26) for instance has a red value of 0.7529 and the other input we add this to is a turbulence noise which has a red value at position (483, 26) of 0.000, when they are added together it just outputs 0.0000 for the red value at the same position pixel! Why does that happen? See the image I attach, I create a gradient, I add the noise on top of it and it just eats all the area of the gradient in where the noise is 0, and it just adds these areas where there is noise to the value of the gradient at the point where there is noise. For a better understanding see the image I attach please. I am so bad at describing. Do you know why it doesn't work when adding noise? It's Original Perlin Noise so the values generated are between 1 and 0, we have no negatives floats. I am confused. Thanks a lot for reading.
Hello everyone. I'm truing to replicate composting operation Over which I believe A+B(1-a). Instead I and up multiplying each layer by opposite alpha. It is work fine with constant colors, but it doesn't work with a texture. It turn texture (A) in opposite color. What wrong with that and what I missed? composite_test_01.hip