PDA

View Full Version : Max | camera mapping | pain in behind | need help :-)

everlite
08-11-2006, 11:32 PM
Hey guys, anyone know much about Camera mapping in max 8?

I pretty much know the basics of how to set up a scene based on a projected image, however no matter how much i try i just can't seem to get it to match up, it all seems perfect in the viewport but when rendered it starts to look really crap.

I've created a basic matte from a photo of an old victorian house, and i've modelled the house over the image max, i then animated the camera slightly, just to give a little parallax and give the illusion of depth by panning slight to the left. But no matter how much i tweak it, it still looks really crap and seems to break up. I'm sure this is something that only i can really solve just by persistence.

Well just thought i'd blow off a little steam of frustration! :-)

Any tips or suggestions are very appreciated.

The legend that is Chris Stoski is soon to release Gnomon DVD series on just this subject, 6-8 weeks to wait! i'm shreading my hair out!

I might post the image and perhaps the scene in a short while, for now please see the image here:

http://www.istockphoto.com/file_closeup.php?id=261598

how would you go about doing this?


- Dave.
MPavel
08-12-2006, 07:38 AM
well, i know about Camera mapping in 3d max )

But it`s hard to understand your problem if i don`t know what exactly you do in 3d max. If you could send me a file that would help to find out what is wrong ))
everlite
08-12-2006, 10:19 AM
Yep you're right, i'll post all files tonight, becoming a really headache this one :-)

Cheers - Dave.
PsychoSilence
08-12-2006, 07:04 PM
does this tutorial help you out?

http://www.cgarchitect.com/resources/tutorials/misc/tutorial2.asp

cheers

anselm
everlite
08-12-2006, 07:49 PM
Cheers but no, i think i'm pretty much doing everything right, it just looks so ...? wrong.

Give me 20 minutes, i'll post the scene and all files.

- Dave.
everlite
08-12-2006, 08:22 PM
http://www.thedaveidentity.co.uk/web/summer_house.jpg


http://www.thedaveidentity.co.uk/web/winter_house.jpg


http://www.thedaveidentity.co.uk/web/house.zip


So, above you can download the max file and maps, still very much work in progress but i'm getting there slow but sure :-)

The first image is the original stock image while the second is the winter matte.

To add to this i've just taken a few more screen grabs that can illustrate my issue further:

http://www.thedaveidentity.co.uk/web/w3.jpg

Notice the wall where the snow meets the house.

http://www.thedaveidentity.co.uk/web/w2.jpg

Notice the stretching when rendered.

http://www.thedaveidentity.co.uk/web/w1.jpg

Overlayed wire to make a little clearer.


So any advice or suggestion are very welcome.

Cheers - Dave.
everlite
08-19-2006, 11:37 AM
To conclude this i was only using one camera, that's why i was getting the stretching effect :-)Use one for projection and one for animation :-)
jkletzien
08-23-2006, 03:56 AM
sorry, didn't see it had comcluded.
jussing
08-23-2006, 10:30 AM
Looks odd... looks like you've done it just right, yet when you render, the texture slides.

Note that if you change image aspect ratio of the image you render, non-collapsed camera map modifiers may change the way they project their image.

Meaning, if you map a 4:3 photo, but want to render a 2.35:1 scope image - be careful! :)

Also (I bet this isn't it, but I have to say it), you're not moving the camera you're mapping from, are you? :)

Cheers,
- Jonas

EDIT: dammit, I hadn't seen it had concluded either.... this new thread view system is confusing me! :)
CGTalk Moderation
08-23-2006, 10:30 AM
This thread has been automatically closed as it remained inactive for 12 months. If you wish to continue the discussion, please create a new thread in the appropriate forum.