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neofg
05-26-2006, 04:02 PM
Hi all...I have a simple question...then the answer will be more complicated...:)
I NEED TO MAKE A 360°matte painting... with sky and terrain all in one, because the camera in this shoot move all around a centered object... Now... What is the best way to paint and then map (in Maya) the matte into the 3d scene? I have 360° of cities and landscapes, and sky references.(i.e: http://memory.loc.gov/cgi-bin/query/D?pan:15:./temp/~ammem_2DAV::.)


All helps are welcome...
Thanks...

Francesco

earlofbass
05-28-2006, 03:20 AM
While I am not an expert I do have some experience with panos.
First, does this scene need to be a true spherical 360 image, or do you need a horizontal 360 ranging about 150 to 170 degrees field of view.

If you just need a vertical image, you can paint a long image. say about 4000PX wide and 1500PX high and make the ends seamless. it's like making a seamless texture in photoshop. Map the texture to inside of a cylinder.
Here is a pano I took one night with a friend. I used a 50mm lens, that's why it's so long. there are 28 frames to make this 360 image.
http://www.flickr.com/photo_zoom.gne?id=147647907&context=set-72057594100743176&size=l (http://www.flickr.com/photo_zoom.gne?id=147647907&context=set-72057594100743176&size=l)[/url]

Humm fast and dirty Cube Map (Vertical Cross image).... I would use one of the HDR examples from the HDRshop web site as a base for you mat. Map it to a cube dome in your scene.
[url="http://www.debevec.org/Probes/"]http://www.debevec.org/Probes/ (http://gl.ict.usc.edu/HDRShop/tutorial/tutorial4.html)
http://gl.ict.usc.edu/HDRShop/tutorial/tutorial4.html (http://gl.ict.usc.edu/HDRShop/tutorial/tutorial4.html)

Me, I'd find a pano image online and us it to set up my scene. Map it to a environment dome or sphere. Then I'd paint on the image. I'd find more panos online with good sky's, mountains and cut and paste the parts you like. Take note of the distortion along the tops, bottoms and in the image itself. You'll will see more distortion in images created with wide angle lens. The challenge is recreating the distortion so it look correct mapped in the sphere.

Try http://www.vrmag.org/ (http://www.vrmag.org/)
You can find link to other sources there as well

check out Greg Downing site
http://www.gregdowning.com/ (http://www.gregdowning.com/)
http://www.gregdowning.com/pano/index.htm (http://www.gregdowning.com/pano/index.htm)

I hope this helps some.
earlofbass

neofg
05-29-2006, 03:20 PM
Help some? Help a lot lot lot...

I make it so...I take an hdri in LL format, then find a 360°photo of a 1900's cityscape and worked with it to make them united...
So this is a WIP test, perspective is not so right now...I need to work again to it:

http://www.geocities.com/neofg/factory360.jpg

Just my other question is how to map it to make a 3d scene of the nearest palaces...
Thanks a lot buddy...You helped me a lot...

earlofbass
06-01-2006, 03:13 PM
humm. You can try putting the image in static cameras and a project map modifier on the close geometer.
I think, I haven't done this since max5, I think you need to set up cameras to cover the 360 area. Set up some buildings, primitives, or plains. Assign the projection modifiers to the objects. Cut your matt pano up and project the peaces through your cameras.

Good lock you’re doing really interesting stuff.
earlofbass

neofg
06-01-2006, 03:22 PM
Mmmh, that's a nice idea... My problem is that in the end of animation camera fly over the building very high, so I Can see the change of perspective on the mapped sphere... :)
Thanks for your suggestions...Other ideas are ever welcome...
Thanks all...

earlofbass
06-02-2006, 01:00 PM
Hi Neofg

That is a problem. I'd make some basic building and bake matt building on the geometry using projection mapping. then clean up the problems textures, the ones facing the camera, hey you can add roof details also. I'd add some motion bur to hide the far-away stuff or stuff that’s to close. lol

For the distortion...you could try fixing it in post with aftereffects or combustion. What I'm thinking is.....create an animated texture distortion to counter the distortion in your scene with the static pano. -- I don't think I could make this work correctly, but I'd use my pano tools to warp the image in the axis of rotation for the scene camera. Then output a series of distorted panos to create an animation texture for the problem areas. I don't think this is the best way to go or that it'd work at all, to many veritable.--
I'd fix what you can before rendering, output to Targa, RLA or RPF format and fix any distortion problems in post. Oh don't forget the motion bur and depth of field. lol

earlofbass
06-02-2006, 02:01 PM
Humm I see trees in back ground of the image. That complicates things. lol

neofg
06-05-2006, 12:42 PM
Yeah! That's the right way...I'm render a test scene, so I post it when I finished...
Thanks for the help!Very thanks...!

earlofbass
06-07-2006, 05:20 AM
Hey anytime. I was glade I could help. :thumbsup:

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