vray animation question

[kamikaze]

Hi all! this is the first time i did an animation in vray. My frame renders too long.....20-30 mins on 512x341 res. and my irradiance map settings is on very low!!

(im doing a 20sqm bedroom with a few furniture and one direct light, one vray light and one vraylightmatl)

I know there's a way to reduce this and use the existing IR map for al the frames i will be rendering.

 

my pc specs...P4 2.4Ghz 1mbCache 1Gb ram, fx5500 videocard.

i rendered the same file on P4 3.0Gig 1Gb ram, on my friend and my render time is only 15 mins...

 

i found out that the pc is using only 256mb of ram for the max application and 100% of PC computing power whe nrendering(processor intensive i believe!)...im not utilizing my ram enough.....

 

Question:

 

1. how do i reduce my render time(like tinkering of what GI engine to use...photon/light map...qmc....ir map..settings......etc)?

 

2. how do i make my pc more ram intensive in its calculation so i get better render times?(the max application is not utilizing the ram capacity i have)

 

3. how long on average should a frame render at 512x341 res? assuming youre doing a bedroom 20sqm in area and using only 3 render lights(1direct 1vraylight and 1 vraylight matl)

 

4. my animation has polygonal white spots scattering pulsating over my ceiling. is it bec of the very low IR preset?( if i use low or medium setting....my render time will quadruple!!!!)

 

*because 20 mins/frame @512x341 resolution is ridiculously long for me.

 

help!!!!!!!!!!!!!!!!! thanks people!!

[Arnold Sher]

There are various issues that need to be addressed but i shall try to get to the point of reducing the time of render:

 

1. Faster computer is obviously one way of speeding up the the process but not a solution.

2. What you want to do is save the irradiance map every tenth frame and once you have that, render the whole animation with a lighting solution. That should dramatically speed things up.

3. Check that you are using vray materials right throughout as that contributes to the speed of your render.

4. I personally try and stay away from vray lights for interior animations, just find it extremely slow and frustrating. The way to go is photometric linear lights... Fast and better effect achieved...

 

Once again, just personal opinion and what works for us... There are guys who will probably prefer other ways of doing it...

 

Good luck...

[kamikaze]

thank you very much arnold!.....

 

. What you want to do is save the irradiance map every tenth frame and once you have that, render the whole animation with a lighting solution. That should dramatically speed things up.-------> how to do this???

 

yes i use vray matls.....

any idea on how to maximize my ram?? i heard somr gi engines are more ram ntensive?? thanks again and replies would be much appreciated!

[anvaraziz]

animation in v-ray,,, sure u need a render farm:D

[Arnold Sher]

...in vray folder, under irradiance maps there is a folder called incremental add to current map, tick that and direct it where you want that solution to be saved. Under common render parameters set it up to render every tenth frame for the length of your animation. Once you have your rendering solution completed go to the file called "from file" pick up your file of the rendered lighting solution and render that like you would render a normal animation. That should speed it up drastically as the computer does not have to recalculate the lighting for each frame seperately and that will speed things up. As for maximising the ram... That is not how vray works and basically the speed is determined by your processor and not by you ram.

 

Hope that helps...

[Aaron2004]

Just a quick hijack of the thread for myself....can you animate in Mental Ray as easily as you can in VRAY? I have mental ray and need an interior animation done...before I buy VRAY advance, can I get the same results (network rendering, saving irradiance maps) in mental ray?

 

Thanks!

 

Aaron

[Crazy Homeless Guy]

depending on the speed of your camera, you might be able to up the incriment of your frames. i have done as high as every 30th frame with no problem.

 

20-30 minutes a frame isn't bad.

 

what is your AA settings? ...they are going to have a huge impact on rendering time.

[Christopher Nichols]

thank you very much arnold!.....

. What you want to do is save the irradiance map every tenth frame and once you have that, render the whole animation with a lighting solution. That should dramatically speed things up.-------> how to do this???

yes i use vray matls.....

any idea on how to maximize my ram?? i heard somr gi engines are more ram ntensive?? thanks again and replies would be much appreciated!

 

Try this tutorial

 

http://www.spot3d.com/vray/help/VRayHelp150beta/tutorials_imap2.htm

[martincg]

to Aaron2004: with v-ray it is more faster, because you can save to disk prerender of GI /irradiance map/ and lightcache for second bounce is really fast too and could be saved too and than reused.

 

for fast solution in mental you can try ambient occlusion, and final images composite with diffuse color,reflect,refract... in composite video program /Combustion, adobe premiere etc../ or composite it through automate batch in photoshop :-)