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M8 Compositing handles alpha values poorly

Posted: Fri May 17, 2019 2:11 pm
by geoffmatters
RGB values of pure white over solid pure white should render to pure white regardless of the alpha values of the upper layer.

However in M8 a pixel which is RGBA 255,255,255,127 will render grey when composited over white.

Attached is an example showing a PNG with white shapes with antialiased edges over a solid white layer. M8 renders it with a dark outline. Photoshop renders the same thing as pure white.

Re: M8 Compositing handles alpha values poorly

Posted: Fri May 17, 2019 2:14 pm
by geoffmatters
I can't attach anything because "Sorry, the board attachment quota has been reached."

Re: M8 Compositing handles alpha values poorly

Posted: Fri May 17, 2019 2:22 pm
by geoffmatters
Repros with 2.92 as well as latest 3.0 on my MBP with AMD Radeon R9 M370X 2048 MB