/city model //crashes

[niker]

I am working with a large city model 5.1 milion polys obviously spread over a huge area.

It has no more than five simple vray materials, no textures.

The problem i`m having is max crashes when loading the geometry for rendering.

Have any of you worked on something big like a city and experienced the same problems?

Is it because of the big area the model spreads that causes the crash. because theoretically the number of polygons shouldn`t be a problem as i have seen bigger scenes render with vray with no problems which are more compact than a city. Would the scene origin effect vray when it comes to rendering?

Any suggestions will. be highly appreciated.

Version of vray: 1.09.03n
PC Spec: Dual 3 ghz Xeon HT, 2gbs ram.

[cpnichols]

First off... Vray Proxy would generally be a solution, but what else are you doing in your scene? Images size? GI method? Anim? Still?

[niker]

It is not a case of image size, GI settings, or the like, this much has been tested. When vray builds the SD tree max crashes, and falls back to the desktop.

[niker]

I tried turning down the max tree depth parameter, and on PAL, i got it to work at 5. But, now the rendering is taking a whole lot longer with this new model compared to a previous less complex model, without GI etc. Any tips for speeding up render times, without me having to remove scene geometry?

[RErender]

There is always the 3GB switch

[tricky]

try turning off hyperthreading?

[Joost Ink]

are you using instances? set the default geometry to dynamic in vray system parameters?
Also the type of AA matters, I think adaptive uses less mem when you have a lot of detail geometry.

[niker]

Cheers. Setup the 3GB switch, seems to work ok well now.

[jujubee]

Glad to hear it's working - but did you try making it a Vray proxy as Cpnichols mentioned?

[Mirko]

"Version of vray: 1.09.03n "

Thats one of the big problems you have

Just update to a newer version. Then you will have the option to change the memory management from "static" to "dynamic".

Mirko

[Joost Ink]

as far as I remember this is already an option in .09.03n
but ur right, i do not see any reason why not to upgrade.

[samuel_bubat]

i do not see any reason why not to upgrade.

not during a project.. Especially when he already saved his scene in 1.09 !!
I have big rendertimes problems with an old 1.09 project that needs to be rerendered.. now that we finally switched to 1.46. ...

[Mathew Everett]

"Version of vray: 1.09.03n "

Thats one of the big problems you have

Just update to a newer version. Then you will have the option to change the memory management from "static" to "dynamic".

Mirko

where is this setting?

[tonymacdonald]

we have a sydney cbd model and outer terrain of the full sydney metro area. i havent had any problems with our model.

i have made sure the model is set close to 0,0 and not set to a suveyors coordinate sytem as ive found this can cause some issues in max. i also have my units set to metres not mm.

Cheers
Tony MacDonald
Arterra Interactive

[DaForce]

tonymacdonald:
A Sydney CBD model....awesome.
Is it full detail or are the buildings pretty basic?
How was it made?

Sorry for all the questions