revit NOT using 100% cpu while rendering!

[tecton3d]

as per the title, I can't get ether Revit '09 or '10 to fully use all the 8 cores on my workstation despite allowing all cores access to the render via Task manager. Is there a toggle somewhere that will allow renderings to use all cpu cores?

 

current rig is an Intel MacPro running visa x64

 

revit 2009 and revit 2010

Xeon - W3540

8gb ram

radeon hd 4800

 

thanks!

cheers!

[frank1331]

Is it a possiblity that your scene doesn't require that much of the CPU to work. That is the only thing I could think of. Revit should only use what it needs. How much is it using on a large scene?

[tecton3d]

it IS a large scene... full model (furniture, fixtures, materials, etc) about 255mb's worth of model...

 

I'm only rendering thumbnail size images most of the time (checking lights, mats, etc.) but even with large renders, it still only goes 50%

 

thanks for the help

[Scott Davis]

Mental Ray in Revit will only use up to 4 cores for Rendering.

[BrianKitts]

I'm pretty sure revit still can't utilize multiple cores.....

[tecton3d]

is there a fair reason... or is Adesk just pushing us to purchase max?

 

ridiculous

[Verma]

Revit is not capable of using multi-core/multi-processor technology with built in mental ray. If you need more rendering speed/power, you must look into getting 3ds Max Design as you'd be able to use all the processors/cores on your machine + setup a renderfarm also.

[Scott Davis]

Revit is not capable of using multi-core/multi-processor technology with built in mental ray. If you need more rendering speed/power, you must look into getting 3ds Max Design as you'd be able to use all the processors/cores on your machine + setup a renderfarm also.

 

That's just not true. Revit has always been multi-threaded in Rendering, even with Accurender. With Mental Ray, it utilizes up to four cores for rendering. Ohter processes are now multi-threaded, such as wall joins.

[Verma]

That's just not true. Revit has always been multi-threaded in Rendering, even with Accurender. With Mental Ray, it utilizes up to four cores for rendering. Ohter processes are now multi-threaded, such as wall joins.

 

So mental ray in revit would only use 4 cores at the most?

If I have a workstation with Dual Quad Core Processors, MR in Revit would use only 1 processor? Correct?

 

My original comment was specific to mental ray in revit not the other features.

Edited November 3, 2009 by Verma

[kris McIsaac]

like Scott said, Revit can only use 4 cores for rendering and for you with 8 cores total it would be 50% - 4 out of 8.

 

Some people are saying it is a deliberate restriction in Revit either to keep Max sales up or to make easy improvements in the future and it could be, however I would think that the majority of Revit users would not have more than a Quad machine anyway as it is mainly for model/drafting and rendering comes second. As the multicore computers become more common I would guess they would adapt the software to take advantage of it.