Hi. I'd like to confirm a possible bug I just found with Core Image (or, possibly Quartz Composers Core Image wrapper support)
Create a composition with an image input, image out to Apples Gaussian Blur, to a billboard. Note the color of your image. Now, make the radius of the Gaussian Blur very low, something like, 0.0001, note the shift in gamma in your image, it becomes ~10% darker. A value of 0.001 has no effect, so this looks like a precision issue. Now, I know, "dont do that", unfortunately, when using Quartz Composer (or well, even outside, but I have not tested in a host app), you can get into situations where an LFO, Interpolator, Timeline, or random will give you that value, thus rendering an incorrect image. Simple Patch demonstrating: I'll file a bug, but I thought it worth mentioning on the list. Apologies for the cross post, but I thought both 'teams' (?) might be interested, or have something to say. Thank you.
Gaussian Bug.qtz
Description: application/quartzcomposer
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