Some issues with animation

[leoviale]

Hi guys, I'd made an animation, using Irradiance map as primary bounce, and Light Cache as secondary, baking both GI maps, for a fly-through camera animation. I have 240 frames, so, first, I made a GI map every 30 frames, using a Fly-through mode on Light Cache, below I'll add a screenshot of my settings. I used 2000 subdivs, but I don't know if it's ok, because as far as I know, light cache makes the whole GI calculation from the entire sequence that I defined, in this case, 9 frames from 240 (every 30 frames). So, if is so, I have to use like 500 subdivs x 9 frames, and that would be 4500 subdivs, but if I set this up, Max crashes in the middle of the process. That is one problem I think. Anyway, I used 2000 subdivs, and then made the Irradiance Map calculation, below r the settings.

Now, my finished GI was not good, I had allot of splotches, GI noise and artifacts, but I don't know why it happened, I guess it's because of the lack of subdivs from light cache. Also there r some areas where there is a lack of GI calculation, I have to fix that, u will see it on the picture where there is a TV and a computer, on the wall close to the ceiling and also on the right side of the wall.

Here r 2 frames from the entire sequence, and 1 more cranked up so u can see more clearly the GI noise problem, and finally my vray settings.

 

[Thablanch]

each 30 frame is not enough... the GI (irrMap) calculations is based on the traveling speed of your camera.. if you camera is walking by slowly.. 10 is of.. if it goes faster, you can go with each 5 frames...

For the LightCache...I do nor really get your calculation.. mabee it is just me...

LC takes care of the whole animation... I never went over 3000 samples. it is a ratio of samples vs/space to cover.. for interiors, you should try mode in LightCache, as you should stick with screen for exteriors.

As well, for Irrmap, I personally prefer lo go -3/-1, and bump the subdiv a little higher..

 

Hope it helps a little

 

Ciao!

[tayrona]

I dont know exactly whats your trouble, but, here is the way I have rendered a lot of interior animations without problems. First: calculate LC in flythrough mode... use LC in primary and secoundary bounces. (2000 subdivs should be more than enough)... although you use flytrough, set the Time output on single...

 

Having the vrlmap, then go to calculate the IMAP, using incremental add to current map mode... (IM in primary and LC in secoundary using the "from file option") (if you are going to use a lot of rendering nodes, more than 20, then use animation prepass better than incremental)... the every Nth frame depends on your camera speed... but I should guess that if you have 240 frames then, each 10 will be safe. and thats all!

Edited June 10, 2009 by tayrona
spelling mistake

[REMOTE-RENDER]

For you light cache settings, drop the subdivisions to 1000. Go as high as 1200 if 1000 will cause you to lose sleep. Increase the sample size from 0.01 to 0.02.

 

The higher your subdivisions, the greater likelihood of generating noise.

 

Another noise generator is the number of passes. If you have 9 CPU/Core's, 9 passes would be fine, theoretically. Other than that, you shouldn't use more than 1 pass per CPU.

 

While you were going way over the top with your light cache settings, you could have gone a little higher on your irradiance map settings.

 

To save time in the future, don't use "incremental add to current map". If for some reason, every nth frames wasn't enough, you'll have to redo the entire irradiance map.

 

Instead, generate individual irradiance maps using "Anitamtion (prepass)" described by Tayrona. When done, you can merge them into the equivalent of an incremental map (using V-Ray's "Irradiance Map Viewer").

 

If you need to add more, then you'll only have to generate the additional ones, which you can then merge to your existing map.

 

Depending on the speed of you camera, you can have parts of your sequence running with an irradiance map for every 3 frames and other parts with every 30 frames.

[sandman92]

u just need to stick on the main settings of vray just few litte changes

1.use ir map and light cache as a pm and sec bounce.

in ir map give use preset low and hdvis50 interl 30 samples

in lc use 300

for removing noise just give adaptive subdivision sampler 1/2 u can check the values by doing some test renders.