vray architectural flythrough animations?

[metro_digital]

Hi, Im still pretty new with using vray. I would like to know how I would go about rendering a whole flythrough animation with vray. I recently discovered that you could save the irradiance map, so you dont have to calculate it everytime, but if the camera changes angles, you can see big black marks on the backs of objects. Is there a way to set up vray so that it will build an irradiance map only when it has to and render the rest of the images off the saved map. Maybe add to the irradiance map when it needs to? Otherwise the only other method I can think of, is to calculate an irradiance map at the first frame, and then add to the saved IR map every 10th frame after, for the rest of the animation. Would this work?
Any answers would be very helpful. Thanks

[RErender]

yep, 10th, 20th, 30th depending on how fast/complex the camera move is.

[Da_elf]

yeah. we wrote some tutorials about the process a while back when savable irradiance maps were 1st introduced. you can fid them and many more on www.vray.info

[biglolly]

Hmm, those tutorials still don't answer it for me. They assumed you only had one irradiance map. I have a new irradiance map for every 20th frame, and I have no idea as to how I get max to now load these as the render needs them. Also I'm using backburner for my rendering.

[Da_elf]

why do you have a new one every nth frame? arnt you using incremental add to current map? if you do that then it will create 1 single irradiance map for you. also you can use the script to merge all the maps into one using the vray imap viewer

[biglolly]

As far as I can tell, I had to have a new irradiance map for every 20 frames because of a bug in max 7 that prevented the saving of irradiance maps after a render had finished.

I'm creating a new irradiance map now however. It only covers 80 frames of animations, but I'm curious to see if it will save as soon as backburner is finished. If not I'm in trouble!

[Dynedain]

Try rendering just the irrmap first (and not through backburner if you can avoid it) then you can use it fro the backburner rendering of the final pass

[tom schuelke]

Hi bighlolly


do it this way.

turn on irradiancemap (maybe also lightmap, now called otherwise with the new 1.4612, in secoundary bounces) use "incremental add to current frame, this way only new areas coming to the camera get new calculated, turn also on "dont render final immage" in the global settings,
after this turn on .. only render every tenth or twentyth frame.

for the irradiancemap also turn on automaticaly save to ....., and maybe switch to saved map.

now after your animation , the irradiancemap should be saved, and in this scenene , the irradiancemap mode has switched to the output path you have saved it, and load irradiancemap from ... path is turned on.

also now turn on again render final immage, and render every frame, and go for it.


when you use lightmap for the secoundary bounces, dont forget to use animatiionmode for this prepass, and maybe worldunits.

good luck


Tom