# Virtual Reality ### Fix visual artifacts In VR the camera renders 2 perspectives per frame, one for each eye. The billboard, screen-oriented grass looks good in 2D, however, this relies on some visual faking which will cause a perceived flickering in VR. It is recommended to use the randomized grass orientation, which ensures that the grass is rendered perspectively accurate for each eye. ### Optimization As performance is extremely important in VR, you should look at the page about performance optimization in detail. ### Grass Fallback Consider using the grass fallback instead of the shader itself. While the grass shader is very performant, it is still a high-end effect. The grass fallback could be used to reduce this performance cost, while still keeping your art style. This is especially useful if you are creating an application or game that supports both 2D and VR: On regular screens, you could use the shader, while in VR the fallback could be used to improve the performance and reach even higher FPS. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.stixgames.com/guides/virtual-reality.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.