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seen Jan 14 '13 at 11:32

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accepted Photoshop - turn white transparent, specifically preserving shadows - new issue
Jan
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comment Photoshop - turn white transparent, specifically preserving shadows - new issue
This answer has really helped me. I would like to elaborate on some of the points you have given here. What is most important, for example, is finishing with a transparent BG. Your method allows this to happen though in your example you have chosen blue. Secondly I should let you know that I'm using Vray for Rhino. There are confirmed bugs in outputting just the shadows hence this big work around. I will create a new answer, modifying your advice here with a guide how I created the effect needed. So thank you very much for your assistance, you have put in a tremendous amount of time and effort
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asked Photoshop - turn white transparent, specifically preserving shadows - new issue