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« on: 2022-11-25, 04:56:24 »
I feel I'm doing more work than I need to for this project and hope someone can shed light on a more efficient way.
I've created a number of static scenes that will and up being A1 prints. As the backgrounds are all this companies brand colour, and to save render time I decided I don't need to render the entire poster, just the region with the objects. So the challenge is to separate the object from the background, but include the shadow. I have a shadow catcher on a floor plane, but when I render it (without the floor) my floor shadows are black, not the red/orange that they are visually. So instead I've been rendering the file three times to mask in photoshop properly
- once of the entire scene including background,
- once with the background with a composting tag set to not be seen by camera but with a plane on the floor with a shadow catcher material
- and once with just the object alpha.
When I composite the file I use the layer with the floor shadows set to multiply to create nice red shadows on the solid background.
I feel there is a smarter way of doing this rather than render three times! Looking at mulitpass it wasn't obvious how I could solve it. Any advice gratefully received!