Lume_wraparound and aliasing question (QTVR related) 2005-03-21 - By Rob Wuijster
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Hi Alan,
Thanks for the replys. I found out the same thing this weekend about the
spherical thing, after wondering why my QTVR software didn't wanna play
anymore with the latest version of QT. So after some searching on the
web I found two lens shaders for MR, altough the're Maya based it should
work in XSI as well. Here's the link:
http://www.vi-motion.de/latlong_Tutorial/
The cubemap shader is most usefull in my case, and concverting the .mi
file shouldn't be a problem, even for my porgramming skills ;) If that
doesn't work I'll give your suggestion a go.
Cheers,
rob wuijster
S-5 multimedia
holland
-- --Original Message-- --
From: owner-xsi@(protected) [mailto:owner-xsi@(protected)] On Behalf
Of Alan Jones
Sent: Sunday, March 20, 2005 12:39 AM
To: XSI@(protected)
Subject: Re: Lume_wraparound and aliasing question (QTVR related)
Oh - I just noticed something. If you're rendering for QTVRs then you
don't want a spherical projection anyway. Someone managed to get a
patent on using a spherical environment map for interactive panoramas of
some sort - anyway it was enough so Apple couldn't use it for QTVR.
There are two types of QTVR panoramas. There's cylindrical and cubic.
The cylindrical doesn't let you look in every direction and using a
spherical projection on this will give incorrect results. The cubic one,
which is the choice I'd recommened you make - needs a series of 6 images
for each side of a cube to be built - there's a few different apps out
there to take the images and convert them - a google will track them
down. Anyway - rendering out these images is really easy.
Just get a camera delete the camera interest. You need to set the
picture to render a square the FOV to 90 degrees. Render on image for
each direction on each access. Use whichever program you picked to put
them all into a QTVR.
Hope this helps,
Alan.
On Sat, 19 Mar 2005 23:17:44 +0000, Mark Wirt <xsi@(protected)> wrote:
>
> I tried this shader with MAX7 and got good results with 0,1 / .05 /
> Gauss 3,3.
> Perhaps you just have a tricky scene.
> What things were you having problems with?
>
>
>
> Rob Wuijster wrote:
>
> Hi all,
>
> Just a quick question here;
>
> I'm rendering my scene with the Lume_Wraparound lens shader so I can
> use this for QTVR, and I have to cranck up the AA settings very high
> to get some decent results. And way high I mean in the min/max. 1/4
> levels with thresholds of 0.03 and Mtichell 4,4. So rendertimes are
> sort of looooong......
>
> Is this because of the 360 dgr. distortion the shader creates??
>
> If anyone has some good tips on outputting a render for QTVR useage
> would be greatly appreciated ;)
>
> cheers,
>
> rob wuijster
> s-5 multimedia
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