Animated Crain in vray

[aligrafix]

I have a a crain (heavy mechanical) and rendering in max + vray. Problem is that i have used the IRMap for the animation. I get shadow extreme shadow flickering as well as splotches in rendering. I dont know what to do.

[kippu]

i think its a crane ( thing which lifts up and down? ) if it moves then i have no help

[Thablanch]

For animated objects, Irr map settings needs to be very, very high.

 

You can not use a incremental map or something like that.

 

Is it in an environement, or by itself?

 

 

What I tend to do in theses situations is to have as much direct light as possible on the moving object ( like a really dimmed photographer fill light), the areas touched by direct light tend to flicker wayyyyyy less than areas litted by indirect / bounced light only.

 

If it is on a bacground that is a little further away, could be a good recipe to render background and moving objects as separate passes. The background becomes more like a walkthrough, so you can render your Irr map for a few frames only, with " lower and faster" settings, and render the moving objects (closer to you I would assume) by itself with high irr map settings ( or qmc primary bounce for the situation could be good as well) and compose the thing in your favorite comp. package.

 

So, it really depends on your scene, either high enough settings to make it flicker-free, or save some time by composing, if it is possible, of course

[aligrafix]

Thanks. I am using skylight from envioronment of vray. With Primary bounce IRMap, and secondary to QMC. I have tried with very high preset of IRMap but i cant get the best result.

And also i wana know that i should more than one light in my scene? do u mean direct illumination by placing lights near and control the attenuation to remove flickers. My result is quiet much better but if i get removed flickers and artifacts, that will be quiet good. I also tried the "Primary bounce = QMC" and "secondary bounce = Light Cache" but it takes much much time to render on my system. I know that this is brute force but it also didnt solve my problem. I get same artifacts which i get with IRMap.

any other solution? Yeah, you were talking about the Direct illumination, I will be glad if you refer me any tutorial! thank again, helpers....

[Joseph Petrino]

Have you read "Rendering an animation with moving objects" on the vray help page?

 

http://www.spot3d.com/vray/help/150R1/tutorials_anim.htm

 

I think your answer is there.

[manta]

Use QMC for both...

[aligrafix]

Josphe--- Yes i did try that tutorial but that is comositing tutorial with max and vray. I want all in one with vray. It means when i press render, it should render complete scene without any shadow flickering.

 

Thanks Manta:

Also i did use the QMC for both Primary and secondary GI. Also incresed the value of subdiv = 16. This took 26 mins to render on a scene.

I have a scene for test : one plane, with 3 teapots falling on it with reactor. These teapots have realistic animation but i did for their animation. This small scene took 26 mins to render per frame @ 640*480 resolution.

If primary and secondary GI = qmc. Its taking too long while what will happen if i take my own scene with materials and reflections etc etc. fully textured, it will take too much much, which is not a deal for me. I hope u understand.

 

Another, question is , can i use the IRMap for Primary GI and QMC for secondary? with QMC subdiv = 12 and IRMap settings, "multiframe incrmental" without saving that map on the disk?

I am trying to get the results with experiments, when i shall get it, i will post the solution right here.

[aligrafix]

Ok, Dears. I got it. If you need to render animated objects. Use "IRMap" as primary Bounce, and secondary bounce = "QMC" and give Its subdvisions= 16. Then use Very high preset in IRMap to render and use "single frame" option for this. Don't use saved IRmap or Incremental Add to current map.

Thats it. I made a scene with 3 teapots dropping on the floor with reactor. then i render this scene with simple daylight and HDRI.

It took avg. 16 mins approx. to render each frame on my (3.0 GHz, 2 MB L2 Cache with 800 FSB, 2GB DDr Ram)Thats all. Thanks to all who gave me their feedback and solutions. If any one get any other better solution, please! leme know. Thanks to cgarchitect and all cream.