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Other options for GI shadow catching when still using r17?
I’m still stuck with r17, prior to the shadow catcher shader. I remember looking into this ages ago, where I wanted to cast some nice ambient occlusion onto a background image using a hidden catcher. But found that the only/best way was to render the object out without shadows (and use an alpha channel), then render again just the shadows on the visible catcher, and then composite them together in Photoshop.
Since I can’t use a shadow catcher shader/material, and since I’m using GI rather than shadow maps, I assume this is still the only option. I just farted around with it for a few hours to probably end up re-proving that to my crap memory.
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2 Replies
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There was a shadow catcher plug in for users prior to R19. Let me see if I can find it for you.
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No rush! Miraculously, I was able to get the wall/catcher to perfectly match the wall in the photo. It was a total jackpot – I just threw in some off-cam walls, and illuminated window portals, and somehow the GI lighting worked out perfectly. I’ll take it. So I can just super-impose the actual rendered painted wall onto the photo in place of the old wall, rather than trying to knock out the shadows only.
I realize I lucked out on this one, so I should still probably look for that plug-in for next time.
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