CompuServe Thread

Autodesk Multimedia Forum · Autodesk 3D Studio

#overlay shadows

10 messages in this thread

#181825From: Steve OrmondeJul 24, 1995 5:34 PM

Any suggestions on how to create an rendering with shadows that can be overlayed onto a scanned image accurately? – Steve Ormonde

#181848From: MARTIN G FOSTERJul 24, 1995 7:05 PM

Steve, >> Any suggestions on how to create an rendering with shadows that can be overlayed onto a scanned image accurately? << some idiot wrote a chapter on doing a similar thing in the NRP book "3d Studio Special Effects". Borrow (or even buy) a copy and all will be revealed <g>. Martin

#181979From: Jeffrey LererJul 25, 1995 11:54 AM

Martin, <some idiot wrote> HAHAHAHAHA <VBG> just so you might know, this idiot uses that exercise in an advanced lecture on 3-DS and thinks that the idiot who wrote it can sure organize and write well… must be savant or something. Though, come to think of it, extended years of 3-D work tends to make many of us into savant-like creatures. I think the YOST Group affectionatly refers to it as mutant. Jeffrey

#182021From: MARTIN G FOSTERJul 25, 1995 3:47 PM

Jeffrey, >> thinks that the idiot who wrote it can sure organize and write well << thanks …. that's nice …. but I'm still an idiot anyway <g>.

#182006From: Steve OrmondeJul 25, 1995 1:51 PM

>> some idiot wrote a chapter on doing a similar thing in the NRP book "3d Studio Special Effects". Borrow (or even buy) a copy and all will be revealed <g>. << I didn't know you're a writer … <G> Where do I get this master piece? Most importantly, can you give me some quick clues??? – Steve Ormonde

#182011From: Ralph F. FrantzJul 25, 1995 2:54 PM

Hey Steve, I thought everyone had that book by now. <g> I've seen it at almost every book store I've been in lately. That Books and Borders (Next to Comp USA) isn't too far north from you is it? I really should stop by and say hi soon. Ralph

#183113From: Steve OrmondeAug 1, 1995 8:14 PM

OK, OK, i'll go buy it! <g> >> I really should stop by and say hi soon. << You know where we're at! Maybe I'll see 'ya at Siggraph… – Steve Ormonde

#183182From: Ralph F. FrantzAug 2, 1995 9:08 AM

>> Maybe I'll see 'ya at Siggraph… See ya there, Steve. Ralph

#182022From: MARTIN G FOSTERJul 25, 1995 4:05 PM

Steve, >> Most importantly, can you give me some quick clues??? << it's actually fairly involved, but in a nutshell: 1) render your scene in full detail with no background, alpha split. 2) create a stand-in environment that will serve as a "shadow catcher" (should match the perspective and environment of the photo) and render your objects again casting shadows on the shadow catcher. The background and shadow catcher object should be pure white. 3) composite your detailed scene, your shadow layer and the background photo together in VP. note: The settings are critical in the shadow layer. You could try making a full black image (black.tga) which would be in the image layer, use the alpha from the detailed rendering Negative ON, in the mask layer use the shadow images. that's one way. Have fun. Borrow a copy of the book for ultra-specifics, although I didn't quitnce. jonas[adesk]

#183112From: Steve OrmondeAug 1, 1995 8:14 PM

Thanks Martin! – Steve Ormonde