Sadly that's an intel-only bug caused by their OpenGL driver, we don't know for sure why it happens but if I were to guess, there's an error in how textures are handled when alpha masking is in use, we're aware of this bug and we will be rolling out a special patch in the future, that should alleviate the issue on intel integrated graphics systems.got a question for well anyone really .... why is it i have graphic problems only when hermonie is in the room ,... only her no one else does is screw up my graphic on .. i get like black screen on half my screen and then it blinks on and off .. when she leave the room the graphics clears up
If you want to fix it yourself, press SHIFT+G while in the game and from the list of available Renderers pick `Force Angle/DirectX Renderer` then press quit and launch the game again. This will fix it.