# Volume rendering hangs Slicer

**URL:** <https://discourse.slicer.org/t/volume-rendering-hangs-slicer/15085>\
**Category:** Support\
**Created:** [December 16, 2020, 9:35am UTC](https://discourse.slicer.org/t/volume-rendering-hangs-slicer/15085 "2020-12-16T09:35:23Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![manjula](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/manjula/32/80981_2.png) [@manjula](https://discourse.slicer.org/u/manjula)\
**Post date:** [December 16, 2020, 9:35am UTC](https://discourse.slicer.org/t/volume-rendering-hangs-slicer/15085/1 "2020-12-16T09:35:23Z")

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System - Manjaro Linux  
Slicer versions - Current stable and current preview release

> [DEBUG][Qt] 16.12.2020 09:53:44 (unknown:0) - Switch to module: “VolumeRendering”  
> [WARNING][VTK] 16.12.2020 09:56:05 [vtkObject (0xad73ab0)] (/work/Preview/Slicer-0-build/VTK/Rendering/VolumeOpenGL2/vtkOpenGLVolumeOpacityTable.h:191) - This OpenGL implementation does not support the required texture size of 65536. Falling back to maximum allowed, 16384.This may cause an incorrect color table mapping.  
> [WARNING][VTK] 16.12.2020 09:56:05 [vtkObject (0xa110260)] (/work/Preview/Slicer-0-build/VTK/Rendering/VolumeOpenGL2/vtkOpenGLVolumeRGBTable.h:144) - This OpenGL implementation does not support the required texture size of 65536, falling back to maximum allowed, 16384.This may cause an incorrect color table mapping.

When I try to volume render, Slicer hangs and becomes unresponsive. How do I fix this problem?

thanks

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<div class="post-metadata">

**Author:** ![manjula](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/manjula/32/80981_2.png) [@manjula](https://discourse.slicer.org/u/manjula)\
**Post date:** [December 16, 2020, 10:05am UTC](https://discourse.slicer.org/t/volume-rendering-hangs-slicer/15085/2 "2020-12-16T10:05:27Z")

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Figure that out.

Needed to rescale.