# this object won't render in RT (both CPU and GPU)....why ?

**URL:** <https://forums.chaos.com/t/this-object-wont-render-in-rt-both-cpu-and-gpu-why/40013>\
**Category:** Issues\
**Created:** [January 17, 2012, 11:30am UTC](https://forums.chaos.com/t/this-object-wont-render-in-rt-both-cpu-and-gpu-why/40013 "2012-01-17T11:30:29Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![Subburb](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/subburb/32/70505_2.png) [@Subburb](https://forums.chaos.com/u/Subburb)\
**Post date:** [January 17, 2012, 11:30am UTC](https://forums.chaos.com/t/this-object-wont-render-in-rt-both-cpu-and-gpu-why/40013/1 "2012-01-17T11:30:29Z")

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Hello, i’m doing renderings/previz on an archi project with RT GPU.  
All is running fine, except one object : the fences. When i unhide it, RT just stops caused by memory allocation failure. i’m on GTX 580 with 3GB.

it’s a simple object (41 000 polys) , with simple Vray material, made of meshed splines, then scattered with railclone (demo), then collapsed into editable mesh.  
i’ve tried reset xform on it, but no luck : this object just stops RT, **whatever if it’s in CPU or GPU mode.**

Of course it works fine with regular Vray render.

here’s a link to download the object : [http://www.subburb.com/echange/fence\_RT\_Problem.zip](http://www.subburb.com/echange/fence%5C_RT%5C_Problem.zip)

Hope it’ll help to find what’s wrong 😉

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**Author:** ![vlado](https://avatars.discourse-cdn.com/v4/letter/v/779978/32.png) [@vlado](https://forums.chaos.com/u/vlado)\
**Post date:** [January 17, 2012, 7:35pm UTC](https://forums.chaos.com/t/this-object-wont-render-in-rt-both-cpu-and-gpu-why/40013/2 "2012-01-17T19:35:01Z")

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Was this imported from SketchUp? In any case, I have a fix for this, if you are interested please email me to [vlado@chaosgroup.com](mailto:vlado@chaosgroup.com)

Best regards,  
Vlado

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**Author:** ![3DKodo](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/3dkodo/32/23063_2.png) [@3DKodo](https://forums.chaos.com/u/3DKodo)\
**Post date:** [January 17, 2012, 7:35pm UTC](https://forums.chaos.com/t/this-object-wont-render-in-rt-both-cpu-and-gpu-why/40013/3 "2012-01-17T19:35:04Z")

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I’ve the same problem with an object (75000 polygons)…☹

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**Author:** ![vlado](https://avatars.discourse-cdn.com/v4/letter/v/779978/32.png) [@vlado](https://forums.chaos.com/u/vlado)\
**Post date:** [January 17, 2012, 7:36pm UTC](https://forums.chaos.com/t/this-object-wont-render-in-rt-both-cpu-and-gpu-why/40013/4 "2012-01-17T19:36:54Z")

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> [@MY 1st panorama reality (thank you Nomer XD )](https://forums.chaos.com/t/my-1st-panorama-reality-thank-you-nomer-xd/37323/7):
>
> I’ve the same problem with an object (75000 polygons)…☹

It has nothing to do with the number of polygons; the issue is some unexpected (or rather, missing) UV information.

Best regards,  
Vlado

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**Author:** ![Subburb](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/subburb/32/70505_2.png) [@Subburb](https://forums.chaos.com/u/Subburb)\
**Post date:** [January 18, 2012, 10:35am UTC](https://forums.chaos.com/t/this-object-wont-render-in-rt-both-cpu-and-gpu-why/40013/5 "2012-01-18T10:35:58Z")

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Nope, this object was made into max. if you think it’s still interesting to get the fiw, i’ll send you an email. Thanks by advance. RT is very addictive 😉

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**Author:** ![vlado](https://avatars.discourse-cdn.com/v4/letter/v/779978/32.png) [@vlado](https://forums.chaos.com/u/vlado)\
**Post date:** [January 18, 2012, 2:18pm UTC](https://forums.chaos.com/t/this-object-wont-render-in-rt-both-cpu-and-gpu-why/40013/6 "2012-01-18T14:18:31Z")

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Yes, please send it to [vlado@chaosgroup.com](mailto:vlado@chaosgroup.com)

Best regards,  
Vlado

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**Author:** ![Subburb](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/subburb/32/70505_2.png) [@Subburb](https://forums.chaos.com/u/Subburb)\
**Post date:** [January 23, 2012, 11:04am UTC](https://forums.chaos.com/t/this-object-wont-render-in-rt-both-cpu-and-gpu-why/40013/7 "2012-01-23T11:04:36Z")

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Works just fine with the fix.  
btw it’s a bit faster with this build (645 KPs with rt2.2.03 and now it’s 682 with rt 2.25.01)

Many thanks !