# bug in OpenGL ES emulator **URL:** \ **Category:** PowerVR Insider\ **Created:** [June 29, 2009, 10:20am UTC](https://forums.imgtec.com/t/bug-in-opengl-es-emulator/391 "2009-06-29T10:20:10Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![lefty](https://avatars.discourse-cdn.com/v4/letter/l/85e7bf/32.png) [@lefty](https://forums.imgtec.com/u/lefty)\ **Post date:** [June 29, 2009, 10:20am UTC](https://forums.imgtec.com/t/bug-in-opengl-es-emulator/391/1 "2009-06-29T10:20:10Z")
I am using the OpenGL ES 1.1 emulator to test a game I’m developing. I have a texture atlas with several images packed together in the same texture. Each image is drawn as a quad. When I draw the quads without any rotation everythings fine, however if I rotate any quad it will render an extra pixel from the image below it. This looks like a bug in the emulator. I haven’t tested yet on a real device. ---
**Author:** ![GordonMaclachlan](https://avatars.discourse-cdn.com/v4/letter/g/c68b51/32.png) [@GordonMaclachlan](https://forums.imgtec.com/u/GordonMaclachlan)\ **Post date:** [July 3, 2009, 4:26pm UTC](https://forums.imgtec.com/t/bug-in-opengl-es-emulator/391/2 "2009-07-03T16:26:58Z")
This sounds like a common problem with texture sampling and texture atlases: [http://www.gamedev.net/community/forums/topic.asp?topic\_id=432615](http://www.gamedev.net/community/forums/topic.asp?topic_id=432615) Obviously the suggestion to clamp is wrong in that thread, but further down there is a solution. If you still have problems then we can try and help you further. ---
**Author:** ![lefty](https://avatars.discourse-cdn.com/v4/letter/l/85e7bf/32.png) [@lefty](https://forums.imgtec.com/u/lefty)\ **Post date:** [July 4, 2009, 11:04am UTC](https://forums.imgtec.com/t/bug-in-opengl-es-emulator/391/3 "2009-07-04T11:04:20Z")
Oh, that works! Thanks for your help Gordon ![Smile]()