# Rendering fields defined in some blocks of a multiblock

**URL:** https://discourse.vtk.org/t/rendering-fields-defined-in-some-blocks-of-a-multiblock/9576
**Category:** Support
**Created:** [October 12, 2022, 9:28am UTC](https://discourse.vtk.org/t/rendering-fields-defined-in-some-blocks-of-a-multiblock/9576 "2022-10-12T09:28:17Z")
**Posts on this page:** 1
**Page:** 1

<div class="post-metadata">

### Author: ![Kostas\_Politis](https://discourse.vtk.org/user_avatar/discourse.vtk.org/kostas_politis/32/4328_2.png) [@Kostas\_Politis](https://discourse.vtk.org/u/Kostas_Politis)
#### Post date: [October 12, 2022, 9:28am UTC](https://discourse.vtk.org/t/rendering-fields-defined-in-some-blocks-of-a-multiblock/9576/1 "2022-10-12T09:28:17Z")

</div>

Hello all,

I’ve not thoroughly looked at how to render vtkMultiblockDataSets, I’ve noticed that there are a vtkCompositePolyDataMapper and vtkCompositePolyDataMapper2 (the latter seem to be deprecated).  
For the setup of the pipeline, I’m using:

vtkAMultiblockReader → vtkGeometryFilter → vtkCompositeDataMapper → vtkActor

At that point I want to display a field whose values correspond only to block[1] (let’s say these are partial data).

Could you please suggest a more appropriate way of displaying partial data?  
Does the setup of the pipeline for my use case seem reasonable?

Let me know what you think and many thanks!!