[Cin] oops apparently 'subtract' mode is broken!

[Andrew Randrianasulu]

чт, 29 сент. 2022 г., 14:50 Andrea paz <gamberucci.andrea at gmail.com>:

> I think this is a complicated problem. You can see from the Compositor
> image you posted that the upper track (green) does not totally cover
> the lower track (red). So sometimes transparency works and sometimes
> it doesn't. It works exactly the same for me as it does for you. If
> you try some other overlays you can see that sometimes the result
> indicates that white values are also used during the blend, sometimes
> not.
>
> PS: I tried using the first appimage created, August 2020, and the
> same transparency display problem occurs.
>
> PS2: I tried rendering a single frame and the result is correct:
> instead of white parts there is transparency. I did a new rendering
> applying "subtract" and the result is completely wrong: all black!
>

may be because 100 - 100 in alpha channel = 0 ?


See images.
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.cinelerra-gg.org/pipermail/cin/attachments/20220929/6bf943b6/attachment.htm>