[Radiance-general] 3D-360 video rendered with Radiance

[Mark Stock]

Andy,

I didn't see that document before I took on this project, but I think
my method was pretty similar. If it wasn't, I'm not about to re-render
this one. It'd be great if you shared your method to the list!

Note that the Samsung Internet movie player (for playing YouTube
movies on GearVR) expects your movie data to fill the 16:9 frame,
otherwise it won't map correctly. The Oculus player (for movies
downloaded to your phone+GearVR) is a little smarter, though, and will
play both 3840x1920 (2:1) or 3840x2160 (16:9) just fine.

Mark

On 7/1/16, Andy McNeil <mcneil.andrew at gmail.com> wrote:
> Mark! That is awesome!
>
> I've been playing around with 360 stereo renderings in Radiance too. I use
> google cardboard and created an rcalc command for generating view rays
> based on this:
> https://developers.google.com/vr/jump/rendering-ods-content.pdf
> I was planning to present some of my renderings at the workshop in August.
> But your video puts my renderings to shame!
>
> Earlier this week I was looking at image.c to see what it would take to add
> native support for equirectangular view types, including both mono and
> over-under stereo. I think the awkward part would be specifying the pupil
> spacing for stereo renderings. I think we could use the length of the
> direction vector for pupil spacing, but this would prevent adding depth of
> field blur.
>
> Andy
>
>
> On Thu, Jun 30, 2016 at 9:16 PM, Mark Stock <mstock at umich.edu> wrote:
>
>> Folks,
>>
>> I thought I'd let you know about my recently-completed 4-minute 3D-360
>> video that was rendered with Radiance. The subject is a dynamic
>> triangle mesh from a computational fluid dynamics simulation of a
>> sphere of fluid with a density discontinuity. (Lots of grey
>> cylinders.)
>>
>> The original (2D rendering) video is here:
>> https://www.youtube.com/watch?v=OShSC1VyBi0
>>
>> The new video (3D-360, for GearVR and other VR HMDs) is in multiple
>> places:
>> https://www.youtube.com/watch?v=zGFMqEKiAGM
>> https://vimeo.com/173000788
>> https://www.facebook.com/mark.stock/posts/10153805081796376
>>
>> I'll provide a direct download link for all you Radiance fans, who
>> know how hard this actually was:
>> http://markjstock.org/vr/MarkStock_SmokeWaterFire_UHDlo_360_TB.mp4
>>
>> The rendering took 8 months on a 4.4GHz, 8-core Intel Haswell chip.
>> Each original frame was 11520x11520 (in HDR, of course), but reduced
>> to 3840x3840 for storage, and further reduced to 3840x2160 for
>> publishing. In all, almost 1 Terapixel of primary rays were traced.
>> The directory takes up ~600 GB. I used an rcalc/rtrace trick to
>> generate the 3D-360 frames. The command line for each frame looked
>> like:
>>
>> cnt 11520 11520 | rcalc -f 3d360.cal -e
>> "XD=11520;YD=11520;X=0;Y=0;Z=0;IPD=0.02;EX=0;EZ=0" | rtrace -ab 2 -aa
>> 0 -ad 32 -as 0 -dj 0.7 -ds 0.06 -u+ -dv- -x 11520 -y 11520 -n 3 -fac
>> scene0695.oct > img_0695temp.pic
>>
>> I attached the 3d360.cal file in case anyone else is interested.
>>
>> Have fun, and good night!
>>
>> Mark
>>
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>>
>