Hi everyone,
first of all I’d like to say that I love Corona and thanks to it I’ve totally let AR down in C4D (until then I didn’t really try another render engine).
It’s just madness with new Ryzen 1800X+ GTX1070 config !
That said, I’m facing a problem : I can’t get an alpha mask on specific item whatever the tag I assign or not to it.
I always get a mask on all the items of my scene (wich is quite a problem with full frame L-shape background > the mask is fully white).
I assume that I’m probably missing something.
Please see the attached picture.
Could you please give a link that explain how it works or tell me here where is the trick?
Create a Corona tag on the object u dont want the alpha, uncheck visible in mask
Multipass, add a mask pass, Multiple conditions mixing → Instersection(AND)
I’m quite sure multi-pass was activated during my tests.
I’m keeping trying to get proper alpha masks and I still can’t get them.
I won’t bother everyone more with my problem.
Could just someone (synolog ?) share a file with a proper multipass setup (with a basic scene like cube + sphere → alpha only on cube or sphere) ?
Sorry for bringing up this topic again, but is it somehow possible to get the material IDs as direct alpha channels for post production in photoshop or do I have to save the masks individually and add the selection as a new alpha?
Also, when I select to save all the render channels at once it never saves all the masks, just one single one. Am I doing something wrong here or is this already known?
Hi synolog, thanks for your answer! Unfortunately this doesn’t really help me. I will just get all the files directly into one photoshop file, but my problem is with the alpha channels. Isn’t there a way to get them as an alpha channel directly out of corona, just like you have it with the standard renderer from cinema 4d? I think the color selector doesn’t work that accurate to save the alpha channels individually from every mask layer.
I attached an image from photoshop, where you see want I mean
Hi synolog, thanks for your answer! I made some screenshots from a work in progress visualization I am working on. On the first image you see my scene, it had some different masks with it, one for each material. But when I load in one of the masks (image 2) and select by color and then change it to lights, so it just takes the white tones, it just doesnt select them perfectly (image 3). With the Cinema4D standard renderer you have the masks directly converted to alpha channels, so you can simply select the layer and it selects everything perfectly fine. So thats kind of my problem, I can’t select the masks properly when I have more detailed scenes.. Is there anything I can do?
Or is it just a bug from photoshop, so it just didn’t show the selection in the correct way? Thats what I’m thinking after selecting the lights and not the color white..
