# where will the render show the final color

**URL:** https://discourse.vtk.org/t/where-will-the-render-show-the-final-color/10368
**Category:** Support
**Created:** [January 3, 2023, 8:27am UTC](https://discourse.vtk.org/t/where-will-the-render-show-the-final-color/10368 "2023-01-03T08:27:42Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![gujiangtao](https://discourse.vtk.org/user_avatar/discourse.vtk.org/gujiangtao/32/6301_2.png) [@gujiangtao](https://discourse.vtk.org/u/gujiangtao)
#### Post date: [January 3, 2023, 8:27am UTC](https://discourse.vtk.org/t/where-will-the-render-show-the-final-color/10368/1 "2023-01-03T08:27:42Z")

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Hi everyone  
Now I am reading the source code of vtk .But I am confused about something .  
for example ,I have used the GPUvolumeraycastmapper to generate volume,and also set the finalcolorlevel.  
but I really do not know where the set of finalcolorwindow work in the source code. Can anyone help me?Thanks.