cgi IN time lapse photographed skies

[Jonathan]

Hi,

Has anyone any experience or ideas relating to rendering 3d objects within a time lapsed (animated) sky. I am keen to get the effect of changing light and shadows from clouds, sun position etc. onto my cgi objects. I want to use hdri lighting yet obviously my time lapsed sky wont be hdr format so are there any ways around this? I cant find anything like this on a web search.

Thanks in advance

J

[John Dollus]

HDRI lighting is pretty general so you can likely get away with something close and it won't be a problem. reflection would be a different story but depending on your angles, just adjusting and offsetting the time lapse footage will work for that as well. There was an animation I saw several years ago by HOK that i always think of when someone mentions this. It was a highrise timelapse that went from one side of the bldg to the other over the course of a day and i remember being really impressed by it. i've tried looking for it from time to time but haven't had any luck.

[Dave Buchhofer]

Maybe not exactly the answer, but debevec has a freely available timelapse hdr image sequence online: http://ict.debevec.org/~debevec/Parthenon/ShotByShot/sequence02/

 

its a pretty slick shot from a few years back, the downloadable light probes are fairly low res, but its nice regardless.

[Crazy Homeless Guy]

Fake the hell out of it until it looks good, reality is a over rated anyway. You can get some free time laps footage, and HDRI skies form this site also.

http://www.openfootage.net/?s=HDRI+Timelapse

[Jonathan]

Thanks for the input.

The Debevec work is great, as always, I'd forgotton about that.

I like the idea of faking/playing with reality, the trick I think is finding the point of believable non-reality, not as easy as it sounds.

I plan to make my own time lapses on site (well its actually a beach) but recreate most of the elements in Max and AE.

Found an interesting link from this site:

Oh, whats the possibility of 360 degree hdr time lapses?