# Volume rendering multiblock datasets with 3D uniform grids

**URL:** https://discourse.paraview.org/t/volume-rendering-multiblock-datasets-with-3d-uniform-grids/8121
**Category:** Development
**Created:** [October 4, 2021, 3:08pm UTC](https://discourse.paraview.org/t/volume-rendering-multiblock-datasets-with-3d-uniform-grids/8121 "2021-10-04T15:08:37Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![jfavre](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/j/b5ac83/32.png) [@jfavre](https://discourse.paraview.org/u/jfavre)
#### Post date: [October 4, 2021, 3:08pm UTC](https://discourse.paraview.org/t/volume-rendering-multiblock-datasets-with-3d-uniform-grids/8121/1 "2021-10-04T15:08:37Z")

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Release notes for 5.9.0 advertized the fact that one could volume render an MB dataset made of only vtkImageData. (I could never make this work).  
I am now testing this with 5.10.0-RC1, and I can’t make it happen either. I created a single “Fast Uniform Grid”, which I wrapped both with a “Convert to MultiBlock” and a “Convert to PartitionedDataSetCollection”. In both cases, I get an error `Can not execute simple algorithm vtkImageVolumeRepresentation without output ports`  
Am not sure if this should work with 5.9 or 5.10?  
Thanks in advance for the help