IRMap animation problem

[aligrafix]

Hi guys. I have a problem with irradience map in vray.Here is problem:

Scene: 1. I have a ship leaving port. I have camera. Ship is linked with dummy so the dummy is animated and ship follows.

2. The camera is focusing on the Front part of the dark at frame 0 and focusing the front area of star board at frame 100.

3. there is 1 vray light in the scene with nodecay and multiplier is 2. everything is just fine. I saved the IRmap with multiframe incremental for every 10th frame.

4. when i reload the IRmap, and render, it gives me bad artifects. I have followed the Christropher Nicholas DVDs. They are very helpful for me for vray. I followed same procedures he described in detail. The IRMap settings are high with multipass settings.

5. When i render, i get artifacts with animation. So, both ship and camera are being animated.

6. But when i make the ship still and animate my camera, then again save the IRmap, it works fine and gives me best results but when i render it for object animations, it gives me artifacts. I dont know what to do.

7. Sec bounce is QMC.

So problem is, scene with animated camera & still objects works fine. Scene with aniamted camera and animated objects works bad.

What do i do guys. Please! tell me. Thanks for your replies.

[Christopher Nichols]

You cannot used saved IR maps with moving objects or lights in your scene. It only works in scenes where the camera is the only thing moving. You may need to follow this tutorial for moving objects:

 

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

[aligrafix]

thanks great Christropher for your reply.

I have gone through this very lengthy tutorial. this is really really really lengthy process. Although I am a good compositor and use after effects but, this is really lengthy process. Can you refer any easy way to do this? this is becuase it is really bad for me when i am close to my deadlines. I hope that there will be any other fast processing method for this like, lightcache or IRMap etc etc.

thanks for your reply again.

[Christopher Nichols]

I'm afraid not... the only other option you have is to do brute force. QMC primary and LC secondary.

[aligrafix]

well thanks for telling me the alternate method. I have attached my ship pictures and rendered images.The light cache as sec bounce i have:

Subdivs: 1000 , Sample size:0.02, Scale: World (as you said, good for animation), store direct light: on ,# of passes: 2 (HT single processor),

filter: Nearest, Interp samples: 10

can you tell me more good settings? i am getting the result as you can see in my attachments. You can also judge the my model in the scene. It is an exerior scene. I have increased sub-divs, but it is not even working for me. Settings have been attached, plz tell me other good settings.

Thank you for replies..

[Christopher Nichols]

when I said QMC I mean for the GI method, not the AA method. Howver, having QMC for the AA method is fine too. You can probably leave the LC as it is, around 500 or so subdiv. But you will need to bump up the QMC for the GI from 8 to around 16 or more... maybe higher.

[aligrafix]

Oh Oh. sorry i didnt mention the primary engine. They are QMC and sorry i didnt mention that. I just tried to give you the AA settings too and thought you would understand that i have followed you for primary GI. Well, i have test rendered with primary GI with 30 sub-div but i am still getting the same problem. even with IR for primary and LC for sec, i have got big splotches, i m wandering what should i do. i am here asking you questions bcoz you are my teacher as well. attachment pics are for you to understand that this is completely outdoor scene with big ship to be animated, so i dont have small objects to deal with. Thats the problem and i hope this is really pleasure for me to post this question because i have gone through the entire posts and couldnt find any question like mine.

Thanks for helping me and hoping to get right and easy answer for you.

[Christopher Nichols]

The noise issues may be version related... what version of Vray are you using?

[aligrafix]

Oh,bundle of thanks for quick reply. I am using 1.47 version. Well i am also getting 1 warning from vray during render. its saying "invalid lightmap samples". but result got much better than before. Noise is getting out but the error is there. Also render time is reaaaaly big. QMC subdiv are 30 right now. but i am sorry you told in your dvd not to use too high value for this. I just tried it but its giving me better result and also with much much big render time. LC calculation isnt taking much time but QMC and final image is taking much much. Please! i think i am getting closer and will meet the result with good render time with your help. What should i tweek now? any idea.

thanks again for guiding in right direction

[aligrafix]

and sorry for repeating, the problem really is that we have a huge object to be animated so what to do? thanks for replies

[aligrafix]

i have gone through the rendering settings. i have decreased the noise threshold from 0.005 to 0.002 and then 0.001. it worked for me a little but it made something better, i m still getting noise a little but it has boosted my render time from 2min 38 sec to 12 min 55 sec. plz get any other way to make it with less render time. noise is still there but noise threshold value 0.001 is way to hard. thanks for replies....

[manta]

Are you finding 12 min. per frame for a GI animation to be too long ???

[Christopher Nichols]

Sorry to say, but what makes vray so amazing is that its rendering engine can do brute force GI in Vid res around an hour a frame. So 12 min really good. You will not be able to get speeds of 5 mins a frame. It is simply impossible in any rendering engine considering what you are trying to do.

[aligrafix]

Sorry to say, but what makes vray so amazing is that its rendering engine can do brute force GI in Vid res around an hour a frame. So 12 min really good. You will not be able to get speeds of 5 mins a frame. It is simply impossible in any rendering engine considering what you are trying to do.

Ok, in your DVD, what i got is good render time of animation per frame based. So i tried to switch to Vray but if any render engine as this drawback that it takes too long to render the object based animations, what should we do when we are close to our deadlines. Specially i want to hear from you that which rendering engine has been used in films and production.

Also the last request Christropher. Can you guide me that whether mental ray or maxwell or brazil, any renderer can do this? fast rendering and best result is the quality of good renderer so where should I go?

[aligrafix]

Well i m again here and i wana take your attention to the advertisement of vray on cgarchitect. In advertisement there is animated light from daylight to night interior scene. what they did in it to advertise?can you tell me or either show me a better way to go any other renderer!! please!!! i am stuck please do something

[manta]

You could try Gelato, its free, but I haven't heard anything eye opening about it, its supposed to be very fast at film resolution, it seems silly to switch software so close to your deadline,

 

I would suggest not using GI,

 

or going out and buying, renting or borrowing 6 more computers to help on this job,

 

Or using a render farm....

 

 

as for your next project, I would plan it out a little better, leaving enough time for rendering...

[aligrafix]

thanks manta for your suggession. Definately i shall discuss that in story board and plan about the render time as well as more computers. But the problem really is that my scenes will really take much time to render (30 min per frame) at resolution of PAL 720*576? thats really bad information for me. Well i use to work for production so what.. i just leave the vray? there must be alternate method like (saved IRmaps as prmiary and QMC/Lcache as sec) to render things best and in less time.

could you refer me a link to glato? i shall see that. kindly look at my attachments to judge whats going on,,,,

Again thanks for replying this alone thread....

[manta]

http://www.nvidia.com/page/gelato.html

[aligrafix]

Manta. I think that it works only with Nvidia video cards not with others! if it works with nvidia 3D cards then i cant use it until i purchase the nvidia card. I have Matrox Parhelia 128MB APVe (Pci xpress) video card. Will it work with this video card. Seondly, i wana know that if it works with nvidia cards then which card is the best for workstation graphics etc etc.

thanks again