# OCIO Applied To HdStorm OpenGl Output

**URL:** <https://forum.aousd.org/t/ocio-applied-to-hdstorm-opengl-output/1168>\
**Category:** Hydra\
**Created:** [January 25, 2024, 5:39pm UTC](https://forum.aousd.org/t/ocio-applied-to-hdstorm-opengl-output/1168 "2024-01-25T17:39:11Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![scsmith](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.aousd.org/scsmith/32/403_2.png) [@scsmith](https://forum.aousd.org/u/scsmith)\
**Post date:** [January 25, 2024, 5:39pm UTC](https://forum.aousd.org/t/ocio-applied-to-hdstorm-opengl-output/1168/1 "2024-01-25T17:39:11Z")

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I’ve got a hydra viewport (based on a QOpenGLWidget showing the HdStorm render output) and in the paintGl call just before I call Render on the UsdImagingGLEngine, I set the ocioDisplay and ocioView parameters of the passed UsdImagingGLRenderParams to a valid value, but I don’t see any change in the actual displayed output though. My assumption is that by doing this I can essentially change the displayed OpenGl window to use the OCIO mapping. What am I missing here? Any help here would be appreciated!

Details: The OCIO plugin is built and can follow the render calls down into the \_CreateOpenColorIOResources function, so everything i’m passing in looks valid. USD v23.08, OCIO v2.3.0, C++, Windows.