# Better GPU will benefit or not VR volume rendering

**URL:** <https://discourse.slicer.org/t/better-gpu-will-benefit-or-not-vr-volume-rendering/21008>\
**Category:** Support\
**Created:** [December 10, 2021, 4:31pm UTC](https://discourse.slicer.org/t/better-gpu-will-benefit-or-not-vr-volume-rendering/21008 "2021-12-10T16:31:57Z")\
**Posts on this page:** 5\
**Page:** 4

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**Author:** ![Hao\_Li](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/hao_li/32/3420_2.png) [@Hao\_Li](https://discourse.slicer.org/u/Hao_Li)\
**Post date:** [December 27, 2021, 1:54pm UTC](https://discourse.slicer.org/t/better-gpu-will-benefit-or-not-vr-volume-rendering/21008/62 "2021-12-27T13:54:43Z")

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Hi!  
I’ve tried now cropping using spacing 0.7 and it became 1811x2077x1520, and the result was not viewable, nothing happens.

I came across another odd thing for 6900xt windows in slicer, found it while I was having fun cropping. If you open data set A which can not be rendered, such like the one I used (1811x2077x1520). Then drag data set B which CAN be rendered into same slicer window ;D, volume render both data sets and you’ll see two Bs.

 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/f/8/f80e07d6cb4dbddb6a610292b743d3015446a01e.jpeg)

Another interesting thing, here the scale is even changed.

 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/7/0/70ee9ca9b4348fad3aaf873063f4f78c33606b7e.jpeg)

I tried A (not viewable) + B (viewable) + C (viewable) as well, resulted in even more unpredictable results. A + B + C (all viewable) acted normally.

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**Author:** ![davide445](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/davide445/32/13460_2.png) [@davide445](https://discourse.slicer.org/u/davide445)\
**Post date:** [December 27, 2021, 2:11pm UTC](https://discourse.slicer.org/t/better-gpu-will-benefit-or-not-vr-volume-rendering/21008/63 "2021-12-27T14:11:32Z")

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> [@Hao\_Li](#):
>
> I’ve tried now cropping using spacing 0.7 and it became 1811x2077x1520, and the result was not viewable, nothing happens.

Thanks for this, on my side I didn’t have any more test to do.  
Interesting what you discovered.

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**Author:** ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Post date:** [December 27, 2021, 9:04pm UTC](https://discourse.slicer.org/t/better-gpu-will-benefit-or-not-vr-volume-rendering/21008/64 "2021-12-27T21:04:17Z")

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> [@Hao\_Li](#):
>
> I came across another odd thing for 6900xt windows in slicer, found it while I was having fun cropping. If you open data set A which can not be rendered, such like the one I used (1811x2077x1520)

Try with the latest Slicer Preview Release, too. It has many fixes compared to the latest Slicer Stable Release, some of them related to rendering of multiple volumes.

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**Author:** ![davide445](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/davide445/32/13460_2.png) [@davide445](https://discourse.slicer.org/u/davide445)\
**Post date:** [December 28, 2021, 5:15pm UTC](https://discourse.slicer.org/t/better-gpu-will-benefit-or-not-vr-volume-rendering/21008/65 "2021-12-28T17:15:22Z")

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> [@lassoan](#):
>
> Try with the latest Slicer Preview Release, too. It has many fixes compared to the latest Slicer Stable Release, some of them related to rendering of multiple volumes.

@Hao_Li would you so kind to try on the preview release (can download on [this](https://download.slicer.org/bitstream/61c43f01342a877cb3ef389b) link) doing the same test as before with spacing 0.7.  
Also my I ask apart the GPU what other hardware you are working on (CPU, motherboard, RAM).

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<div class="post-metadata">

**Author:** ![Hao\_Li](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/hao_li/32/3420_2.png) [@Hao\_Li](https://discourse.slicer.org/u/Hao_Li)\
**Post date:** [December 29, 2021, 9:49am UTC](https://discourse.slicer.org/t/better-gpu-will-benefit-or-not-vr-volume-rendering/21008/66 "2021-12-29T09:49:09Z")

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@lassoan  
Hi! I already managed changing back to 3090 …

On 3090, I don’t have any problem with multi volume rendering on 4.11.20210226. Oddities I came across on 6900xt didn’t appear.

 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/3/2/323f85ecb1804345f3678140fc69ab38f7a1405d.jpeg)

@davide445  
The components of my computer are ASUS ROG Crosshair VIII Formula, AMD Ryzen 9 5900X, Samsung 980 PRO and CORSAIR Vengeance LPX - DDR4 - 4 x 32 GB.  
The other computer is ASUS ROG MAXIMUS XII FORMULA, Intel Core i9 10900K, Samsung 980 PRO and CORSAIR Vengeance LPX - DDR4 - 4 x 32 GB.

I’m having 3090 on both now … and they both can render  
0.7 spacing crop resulted 1811x2077x1520.

 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/f/9/f99e9d0190e3379de276793772c8f838dc6f2bd2.jpeg)

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