# paraview multiphase
**URL:** https://discourse.paraview.org/t/paraview-multiphase/9035
**Category:** ParaView Support
**Created:** [February 22, 2022, 4:31am UTC](https://discourse.paraview.org/t/paraview-multiphase/9035 "2022-02-22T04:31:31Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@wjchoi97](https://discourse.paraview.org/u/wjchoi97)
#### Post date: [February 22, 2022, 4:31am UTC](https://discourse.paraview.org/t/paraview-multiphase/9035/1 "2022-02-22T04:31:31Z")
when i studied dambreak4phase in openFoam, i had a question…
there are four materials, air, water, oil, mercury in dambreak4phase case…
and i want to see the motion or flow of those materials **simultaneously** in one screen!!
however, the option that i can view the flow of the material only allows me to see the motion of one of these materials mentioned above respectively…
**(the option that i mentioned is “coloring”. “coloring option” in “Display” only provides the single motion of the material respectively, not simulataneously… for example, when i selected water, the water appears in screen. and then to want to see the flow of oil with water, so if i selected oil, and then water disappear in screen, so i can only see the oil… i want to see the flow of water, oil, mercury simulatenously !! )**
is there anyone to tell me solution about this?
(actually i found one way to achieve this, this is related “groupdataset” and “adjusting opacity”, but this method is not efficient… because i have to adjust opacity,
it’s difficult for me to see the material clearly after adjusting the opacity)
oil
water
→ i want to see the two materials simultaneously !!
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [February 23, 2022, 10:10am UTC](https://discourse.paraview.org/t/paraview-multiphase/9035/2 "2022-02-23T10:10:00Z")
Use Calculator filter.
this looks like a duplicate of [render view in paraview](https://discourse.paraview.org/t/render-view-in-paraview/9040), please clone one of them