# Offscreen rendering opening window

**URL:** https://discourse.vtk.org/t/offscreen-rendering-opening-window/1660
**Category:** Support
**Created:** [August 28, 2019, 4:43pm UTC](https://discourse.vtk.org/t/offscreen-rendering-opening-window/1660 "2019-08-28T16:43:43Z")
**Posts on this page:** 1
**Showing post:** 4

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### Author: ![lassoan](https://discourse.vtk.org/user_avatar/discourse.vtk.org/lassoan/32/50_2.png) [@lassoan](https://discourse.vtk.org/u/lassoan)
#### Post date: [November 17, 2020, 9:20pm UTC](https://discourse.vtk.org/t/offscreen-rendering-opening-window/1660/4 "2020-11-17T21:20:53Z")

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CMake flags have “Mesa” and “offscreen” in their names - see for example [this topic](https://discourse.vtk.org/t/black-image-when-using-offscreen-rendering-inside-qt-application/3935). You can find others on this forum and by googling.

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