garageCube

Hello,

I would like to simply project a video loop (place in Quad-2 with blend mode set to Add or Over) with a any background generators, materials or videos (place in Quad-1)
The desire behavior is to see the content of the video clearly with the black video background replaced by the content set in Quad-2. Like a whatever video editing software, instead I see the content of the video in semi-transparency

I searched on internet but I founded only YouTube channel tutorial related MadMapper3. I tried it but in MadMapper4 the result is different. The black color of background in video is transparent (and this is ok) but the rest of video content is semi-transparent and I glimpse the Quad-1.

I also did a test with only built-in generators:
- Quad-2 ColorPatterns (blend mode set to Add or Over, I tried whole blend modes)
- Quad-1 TestCard
The result is the same. I glimpse testCard image where there is ColorPatterns.

How can I obtain the result like a whatever video editing software?

Thanks!

to remove the black background from your foreground video,
either use an alpha channel and compliant codec such as hap-alpha
or apply the luma key filter and key out the black values.

to remove the black background from your foreground video,
either use an alpha channel and compliant codec such as hap-alpha
or apply the luma key filter and key out the black values.

Thank you Franz. But my problem is more simple I think. The background is already removed and this is ok.
But is the foreground the issue. I see the surface below.
Which is the correct blend mode to show the foreground of the last surface (Quad-2)?

In attached there are 2 example of the problem.

Thank you.
Roberto.

you should use over blend mode then.

you should use over blend mode then.

Thanks Franz, But:
- If I use OVER blend mode I can't view in the background color the surface below.
- If I use ADD blend mode I can't view clearly the foreground of surface Quad-2 it is in semitransparent.