unbindSurfaceRenderTexture

Unbind surface render texture with current video material.

When the SurfaceRenderTexture is no longer needed for this VideoMaterial, it is recommended to call this method to unbind the SurfaceRenderTexture from this VideoMaterial. After unbinding, the SurfaceRenderTexture will be released unless .toGlobal() was called on it before this unbind operation happened. In the following example, the SurfaceRenderTexture will be kept alive and can be used for other purposes, such as binding it to other VideoMaterial instances.