140+ Hour Render

[mikegoduco]

Hi guys Ive been using this forum as a guide for helpful tips. I just started using Vray and so far its been fun. I have this one scene Im rendering that is currently rendering and is approaching the 140 hour mark. The resolution is only 2400x900. I did a test render at a lower resolution at 900x225 with the same settings and got about a 40 min render. Im rendering these images using distributed render across 4 computers with i7's and 8-16gb Ram.

 

Attached are screenshots of my settings Im using. Thanks

 

 

 

[Devin Johnston]

Mike I don't see anything that would slow down rendering as badly as your describing, what are you rendering does it have lots of reflective surfaces or a low light?

[Scott Schroeder]

What are you rendering? Can you post an image?

 

Make sure you are using Vray materials. What is your render time if you run a gray override material? What lights/shadow types are you using?

 

Nothing in your Vray settings stands out as super high settings, so it leads me to believe you have something in your scene. Either poorly created geometry that Vray can't process, displacement, bad and/or incompatible materials, wrong lights and shadow types, or all 4.

 

Is all of your geometry near world 0,0,0? If it's really far away from that Vray will have errors. What is the Vray message box telling you? Is it throwing any warnings or errors?

[M V]

Not even Maxwell has render times like that. Good God, 14 hours should have been a red flag, never mind 140. No render should take this long with those settings and that resolution. I rendered a 10,000 pixel wide rendering in less than 12.

[Ismael]

http://www.spot3d.com/vray/help/200R1/render_params_displacement.htm

[mikegoduco]

Mike I don't see anything that would slow down rendering as badly as your describing, what are you rendering does it have lots of reflective surfaces or a low light?

 

What are you rendering? Can you post an image?

 

Make sure you are using Vray materials. What is your render time if you run a gray override material? What lights/shadow types are you using?

 

Nothing in your Vray settings stands out as super high settings, so it leads me to believe you have something in your scene. Either poorly created geometry that Vray can't process, displacement, bad and/or incompatible materials, wrong lights and shadow types, or all 4.

 

Is all of your geometry near world 0,0,0? If it's really far away from that Vray will have errors. What is the Vray message box telling you? Is it throwing any warnings or errors?

 

 

I attached a screenshot of what Im rendering. Im using evermotion trees and plants, as well as cars. I have a total of 50 trees and plants, and 3 cars. I vray proxied all those models. I also turned down the following settings with the materials of the trees and plants:

 

 

 

• Fresnal reflections off
  
• Reflection Subdivs - 8
  
• Refraction Subdics - 8
  
• Opacity - Filtering - None
  

@VelvetElvis

 

The materials are all Vray materials. I only have a Vray Sun and Vray light.

 

What do you mean by gray overridematerial? I rendered the scene out as one white vray material and got a render time a fraction of the 140 hour time.

 

Also the model is near 0,0,0.

 

Im thinking the culprit is the evermotion trees because when i rendered the scene without the trees and models, the render time is a fraction of what it is now.

 

@M Valero

Yeah I know the rendering time is absurd. Ive been trying for the last 2 weeks to get the rendering settings right but I need a final copy by next week. Again this is the first time Ive used Vray. The best way to learn a new software is head on.

 

@Corey Beaulieu

I attached a screenshot below. Its rendering. Ill try your settings out. Thanks!

 

@Hao La

Yes all my vray proxies are instanced

 

@jason addy

LOL

 

@neil poppleton

see below

 

One last thing, Im working in Revit and link my Revit file to 3ds Max. I dont know if that has anything to do with anything. Thanks again guys. I really appreciate it.

Edited September 29, 2012 by mikegoduco

[Corey Beaulieu]

My question would be: Is it rendering? or hanging on the Irr?

 

I don't want to say the Irr settings are the issue, but they stand out to me as incorrect. Try -4 -2 or -5 -2 and make sure your hsphdivs are roughly double your interp samples. -3 -1 is a bit high and 20/20 is just altogether weird to me.

 

I have had a situation in the past where a plant proxy rendered fine at a smaller output size, but when I went to full frame everything locked up in that spot while rendering. Believe it or not rendering a different Irr was the key to pushing the render through. It's been some time since this happened so I don't recall if I pre passed at the smaller size or just played with the setting or both, but It was a headache for sure.

Edited September 27, 2012 by CoreyMBeaulieu

[Hao La]

Do you have a lot of Vrayproxies in the scene? Make sure they're all instances.

[jcaddy]

I think that you should chime in on this Yahoo question......

 

http://answers.yahoo.com/question/index?qid=20080812005329AA1zQs1

Edited September 28, 2012 by jcaddy

[neil poppleton]

Reasonable settings, would like to see a snapshot of your scene.

[mikegoduco]

Hi guys, sorry I couldnt get you an earlier response. I posted one yeterday but it needed moderator approval for it. So sorry for the double post. Anyways, my scene has evermotion trees, plants and cars. There is about 50 trees/ plants and 3 cars. They are all vray proxies and all instanced. I turned down the following settings on the models/ model materials:

 

•Turned off calculate gi on the vray proxy models

•Turned down refl sub to 8

•Turned down refract sub to 8

•Opacity map - filtering - none

 

@Devin Johnston

 

The only reflective surfaces is the glass on the scene and there are 2 lights on the scene. One Vray Light and one Vray Sun.

 

 

 

@Scott Schroeder

 

Ive rendered the scene in an all white Vray material, and I got a render time a fraction of what it is now. All the geometry is near 0,0,0. I model everything in Revit then link my revit file to 3ds max.

 

 

Honestly I think the culprit is the evermotion models, materials. I still need to get the settings right.

 

 

@M Valero

 

Yeah I know the rendering time is absurd. Ive been trying for the last 2 weeks to get the rendering settings right but I need a final copy by next week. Again this is the first time Ive used Vray. The best way to learn a new software is head on.

 

 

 

@Corey Beaulieu

 

I attached a screenshot below. Its rendering. Ill try your settings out. Thanks!

 

 

 

@Hao La

 

Yes all my vray proxies are instanced

 

 

 

@jason addy

 

LOL

 

 

 

@neil poppleton

 

see below

 

 

https://picasaweb.google.com/lh/photo/bsV4WEws00ARZQqalUzrtmyACdKIUrETpCEyZuOL_nM?feat=directlink

[Scott Schroeder]

Do you have opacity filtering disabled in the tree leaves? It should be checked "None" instead of summed area or pyramidal. Opacity filtering absolutely kills Vray rendering with trees.

 

I know you said you did, but make sure it actually is. Also, make sure that you are not using any sort of translucency either. Many times Evermotion trees come with it on, and while it looks good, it is a time killer. Vray 2sided materials are better to fake translucency.

 

If you get a fraction of render time with a gray override, then it is more than likely a material issue. Re-Check all of your mats again to ensure you don't have any wild mat with high subdivs, opacity filtering, or translucency.

Edited October 1, 2012 by VelvetElvis

[mikegoduco]

Do you have opacity filtering disabled in the tree leaves? It should be checked "None" instead of summed area or pyramidal. Opacity filtering absolutely kills Vray rendering with trees.

 

I know you said you did, but make sure it actually is. Also, make sure that you are not using any sort of translucency either. Many times Evermotion trees come with it on, and while it looks good, it is a time killer. Vray 2sided materials are better to fake translucency.

 

If you get a fraction of render time with a gray override, then it is more than likely a material issue. Re-Check all of your mats again to ensure you don't have any wild mat with high subdivs, opacity filtering, or translucency.

 

 

Thanks scott! ill double check the settings tomorrow. ill keep you guys posted.

[abhaysingh]

Yeah Scott is right.If you can render fine with override material then it must material but it could be displacement as well.The screenshot of yours showing "presampling displacement".If you're rendering a 4500px width with displacement ON and without calculating IR & LC then render time will be high.

[dhammikaherath]

How many lights are you using? Better to check your lights settings...