I want to multiply the colors in an image with a solid color,
i.e. pure green to mimic the behaviour of a BW-Photo filter.
The Multiply Patch as well as the sample Kernel Patch (which is a
multiplier)
as well as my custom written patch do not produce the expected colors.
My test image contains three R/G/B discs - when I multiply it with
RGB (0,1,0,1)
I don't get the expected black for red and blue but (0.38,0.09,0) for
red
and (0,0.13,0.17) for blue (values taken as Device RGB with the color
panel tool).
If I use the multiply option of the billboard instead I see the
expected result.
I suspected something along the lines of color management may play a
role
but I think the colors are too far off for that alone.
Interestingly if I replace a __color parameter in my custom kernel
with a vec4
and a RGB Color patch in front of it the color changes take a
different turn -
less saturation, luminosity still wrong.
I have attached a small composition as a testcase, it has inputs,
Hit Command-T on the viewer and set one of the colors to green and
the other to white, then vice versa and you should see the effect.
Also attached is a low quality jpeg for a quick impression of what I
am whining about here.
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