# Downstream Filter add coloring array to upstream data
**URL:** https://discourse.paraview.org/t/downstream-filter-add-coloring-array-to-upstream-data/6510
**Category:** ParaView Support
**Created:** [February 20, 2021, 7:42am UTC](https://discourse.paraview.org/t/downstream-filter-add-coloring-array-to-upstream-data/6510 "2021-02-20T07:42:17Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@sharon](https://discourse.paraview.org/u/sharon)
#### Post date: [February 20, 2021, 7:42am UTC](https://discourse.paraview.org/t/downstream-filter-add-coloring-array-to-upstream-data/6510/1 "2021-02-20T07:42:17Z")
I know it is not recommended that change input data by filter, but due to some special reason (my GUI picker can only recognize and pick initial data, and cannot work for new copy from filter) I need add some new coloring array by downstream filter, I don’t know is it possible and how to do it?
I found direct update input data is useless, it will not update for upstream data’s coloring…
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [February 22, 2021, 8:48am UTC](https://discourse.paraview.org/t/downstream-filter-add-coloring-array-to-upstream-data/6510/2 "2021-02-22T08:48:24Z")
> I don’t know is it possible and how to do it?
It is not.
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### Author:  [@sharon](https://discourse.paraview.org/u/sharon)
#### Post date: [February 28, 2021, 11:44am UTC](https://discourse.paraview.org/t/downstream-filter-add-coloring-array-to-upstream-data/6510/3 "2021-02-28T11:44:23Z")
Thank you Mathieu for your answers!
Best Regards,
Sharon