# Shading one variable with the values of another (volume rendering)

**URL:** https://discourse.paraview.org/t/shading-one-variable-with-the-values-of-another-volume-rendering/2838
**Category:** ParaView Support
**Created:** [October 24, 2019, 7:22pm UTC](https://discourse.paraview.org/t/shading-one-variable-with-the-values-of-another-volume-rendering/2838 "2019-10-24T19:22:57Z")
**Posts on this page:** 1
**Showing post:** 2

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### Author: ![mwestphal](https://discourse.paraview.org/user_avatar/discourse.paraview.org/mwestphal/32/17_2.png) [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [October 25, 2019, 6:52am UTC](https://discourse.paraview.org/t/shading-one-variable-with-the-values-of-another-volume-rendering/2838/2 "2019-10-25T06:52:33Z")

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The only thing that is remotely similar in ParaView is the multi component mapping volume rendering.

> [@Volume Viz with Multi Component Color/Opacity Mapping in Paraview 5.6.0-RC2](https://discourse.paraview.org/t/volume-viz-with-multi-component-color-opacity-mapping-in-paraview-5-6-0-rc2/649):
>
> Dear all, I just saw, that the newest release of Paraview supports 2D Transfer functions for volume rendering which maps data with 2 components by applying the colormap to the first component to determine colour and the opacity function to the second colormap. However, my Impression ist, that it does not work. Under “Scalar Coloring” I switched on “Multi Components Mapping” “Map Scalars” and “Interpolate Scalars Before Mapping”. Representation is switched to “Volume” of course. Using a “Struc…

@Michael may have other ideas.

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