Hi there,

I was trying the composite features in H16, and found out that no matter what I do, the Chromakey and Lumakey nodes don’t output any alpha.

I thought the problem was due to my File nodes not having any alpha plane on them, but even after creating one with the Color node, the alpha doesn’t get modified, just the colour plane —keyed out areas are black as expected. Is this normal behaviour, am I doing something wrong?

Not attaching any example file since the only thing I’m doing is File > Chromakey or Lumakey, check the A plane, and it either doesn’t exist or it’s unmodified by the keyer.

Thanks in advance!

works for me, both keyers seem to modify A plane correctly

16.0.550

Thanks Tomas. I forgot to mention, I’m using 16.0.504.20 on OSX 10.12.3 with an unsupported GPU (Intel Iris Pro). Do you think the GPU might be the issue? I thought COPs didn’t use it…

You'll need to add a Alpha plane if your image doesn't have one. H16 doesn't create default C and A planes if they don't exist anymore. Easiest way is with a Color COP set to “Add Image: A” appended to your file.

Thanks Twod. I already tried that, but nor Chromakey nor Lumakey modify it.

The same here, any solution besides try to update Houdini build?

Check the latest nightly, it’s been fixed!

Man! I have just updated Houdini to 557 and it still not working for me, I did create a channel COP and added the alpha but it still create a entire black alpha channel for me, any tips?

Man! I have just updated Houdini to 557 and it still not working for me, I did create a channel COP and added the alpha but it still create a entire black alpha channel for me, any tips?

It still doesn’t work if you have an A plane, make sure to delete it first!

Luma key is working chroma key not.

Oh sorry, you have to be in 563 or later. I meant daily builds, not nightly, they don’t call them nightly here

Ok, Thanks!