CompuServe Thread

#Refraction

14 messages in this thread
#105691From: Michael F. WilsonJun 3, 1994 9:21 PM
AARGH! Is their any way to do refraction in 3DS. I saw an example of a magnifying glass FLC produced by REALM Production Services on the Inside 3D Studio CD ROM but I can't figure out hew it was done. Any ideas? Is their an *XP routine I can buy? MFW
#105717From: ARA GREGORIANJun 4, 1994 6:22 AM
i know of two ways: A: 1)-you position the camera with a very wide angle lens in place of the refracting object with the same movement. render the animation from this cameras point of view. 2)-then replace the opject with the camera and map the object with the animation you rendered in step one. this will creat the effect. B: render the only background of the object. use this image on a projector light and exclude everything but the object from the light. position the light so that it projects the image on the object. work with the scale of the background image to get the proper effect. i hope this helps. ara (yost group: sorry for jumping in)
#105750From: Kurt McKeeverJun 4, 1994 11:11 AM
<<(yost group: sorry for jumping in) >> Hey, I didn't know you had to be sorry for jumping in, just pardoned 🙂 There sure are alot of 🙂 around here. 🙂 Kurt
#105777From: ARA GREGORIANJun 4, 1994 5:21 PM
>:-) ara
#105887From: david W. mennenohJun 5, 1994 2:09 PM
Michael, Hi there. Glad you liked the magnifying glass effect. I'm the one who did that animation and I'll share the technique I used. It's actually pretty simple to do. First of all create your "lens" and assign it a 100% auto reflective material. Make your piece of "paper" and assign a map to it (in this case it was a pic of a house I did). Basically, you now have the magnifying glass sitting over your piece of paper. The trick is to make a copy of the paper and place it _above_ the magnifying glass. Don't forget to flip it over so your maps are aligned correctly. Flip the surface normals of your top piece of paper so at render time you won't see it. What happens is the magnifying glass will reflect the top piece and make it look like it's magnifying the bottom one. The top piece needs to be closer to the lens than the bottom one so it appears to be actually magnifying the image. I hope this is a fairly clear explanation. Good luck with it. BTW – It's Realm Professional Services not Production Services. If you need any more help on this I'd be happy to help you out. Dave Mennenoh
#106218From: Alex KaramanoglouJun 7, 1994 7:29 AM
Hi Dave, I was reading how you did the magnifying effect and I understood everything till the part of flipping the normals and you lost me after that. Is there any way that you can explain this to me a little more simpler? I appreciate your help.. Alex K.
#106233From: Jonas Ruikis [ADESK]Jun 7, 1994 8:37 AM
Alex, << Flipping Normals >> See pg. 7-134 and 7-135. 3D editor/Surface/Normals/[Face|Element|Object] Flip. jonas[adesk]
#106452From: Alex KaramanoglouJun 8, 1994 6:43 AM
Excellent!! Thank you! Alex K.
#106258From: David RhotenJun 7, 1994 10:03 AM
PMJI, but if you do as David suggests, then you will have this object (a plane) floating above the magnifying lens, but most likely, in FRONT of the camera. So, you use Surface/Normals/Object Flip to point the normals down towards the lens and, thus, away from the camera. Poof, the plane becomes invisible to the camera, as the map you apply should be one-sided and you're looking at the object's back — BUT, the object WILL be "visible" to the lens, which will reflect it. Dave
#106247From: James SpierJun 7, 1994 9:21 AM
David, Hey thanks for the great tip
#107045From: alec jasonJun 11, 1994 12:25 AM
RE: The magnifying glass effect Absolutely brilliant technique! Really, really, clever. Alec Jason
#107097From: david W. mennenohJun 11, 1994 9:57 AM
Thanks Alec. I really appreciate you saying that. There have been some other great techniques described also. That's what's so cool about 3DS always a different way of doing something. Dave Mennenoh
#107055From: Carl FinchJun 11, 1994 1:44 AM
>> the magnifying glass effect. I'm the one who did that animation [on the "Inside 3D Studio" CD-ROM] Well, I give up–where is it, David?! The CD-ROM that came with my book had a scant 5 flc's on it–backhoe, catalog, bball, jump, and ghostfin…period. Where is yours hiding out? <g>
#107096From: david W. mennenohJun 11, 1994 9:57 AM
Carl, Actually it's not on the Inside 3DS book. Whoever asked that question in the first place said the wrong book title. It is on Nancy Fulton's book – 3D Studio Applied. Sorry for any trouble. I uploaded a file to the forum called MAG zip that will show what we were talking about though. It doesn't have any animation and needs tweaking but it is a good starting point. Dave Mennenoh