I am on a crazy deadline - doing HD stuff 1920 x 1080 for a dvd menu. Big title just opened ( can’t say exactly which one ) anyway I am doing a cityscape and have lots of shiny stuff and GI. I am using a single Vray light to provide illumination, pre-calculating the irmap,( lightcache for secondary bounce) calculating every 5 frame and them shooting it off to the farm.
My question is - should I check the - store with irmap option in the vray light ? - what exactly does this do ?
It bakes the shadows from your area light into the ir map so it will speed things up a lot. That said you’ll need to turn up the subdivs of the light to get it to store a decent quality shadow.
So at rendertime, can I turn off the shadows ? Should I leave the save with irmap checked ? I have done some small test renders using the irmap I created and I have a strange grain in the animation. The grain does not flicker it appears to move with the camera. Does this look or sound like a familiar problem to anyone
Yes you could turn off shadows, but the quality of the shadow will depend on the quality of your GI settings. If you can afford the render time I prefer to keep the lights and shadows.
The grain that doesn’t move is normal…I believe the solution is the little checkbox called “Time Independant” on the QMC sampler rollout.
Thanks a million. I have used GI in one or two projects, never anything this huge, It is going to be an interesting couple of days - working the weekend - wish me luck.
No but I can tell you that Katie Holmes is not in it
Thanks for your help - I am sure it is going to be a hellish weekend we are presenting on Tuesday to the man himself so it is a big helping of stress all round.
