OpenGLES3 Error when rendering Cesium Tiles on Quest Device

Mark_Grossnickle · February 28, 2024, 5:25pm

We started getting this error when we switched to OpenGLES3 from Vulcan. Google seems to point to single pass/double pass issues with the shader.

AndroidPlayer "Oculus_Quest Pro@ADB:230YC01DB200SQ:0" Assertion failed: OPENGL NATIVE PLUG-IN ERROR: GL_INVALID_OPERATION: Operation illegal in current state

You can easily reproduce this in the sample cesium projects if you run them on Quest. The errors only appear when a cesium tile is rendering on Android.

Mark_Grossnickle · March 4, 2024, 5:24pm

We believe the shader is Cesium_RoundPolygonMask

If we put that in the scene on something unrelated to cesium tiles it doesn’t throw the error. So we assume its a specific pass being used within that shader.

Brian_Langevin · March 11, 2024, 7:45pm

Hi @Mark_Grossnickle , I went ahead and added this to cesium-unity’s Issues.

github.com/CesiumGS/cesium-unity

OpenGLES3 Error when rendering Cesium Tiles on Quest Devic

opened 07:44PM - 11 Mar 24 UTC

csciguy8

Reported from the community [here](https://community.cesium.com/t/opengles3-erro…r-when-rendering-cesium-tiles-on-quest-device/30212), We started getting this error when we switched to OpenGLES3 from Vulcan. Google seems to point to single pass/double pass issues with the shader. ```AndroidPlayer "Oculus_Quest Pro@ADB:230YC01DB200SQ:0" Assertion failed: OPENGL NATIVE PLUG-IN ERROR: GL_INVALID_OPERATION: Operation illegal in current state``` You can easily reproduce this in the sample cesium projects if you run them on Quest. The errors only appear when a cesium tile is rendering on Android. We believe the shader is Cesium_RoundPolygonMask If we put that in the scene on something unrelated to cesium tiles it doesn’t throw the error. So we assume its a specific pass being used within that shader.

Thanks for reporting this!