private static extern void Internal_create0(RenderTexture managedInstance, Texture colorSurface);
private static extern void Internal_create1(RenderTexture managedInstance, Texture colorSurface, Texture depthStencilSurface);
private static extern void Internal_create(RenderTexture managedInstance, PixelFormat format, int width, int height, int numSamples, bool gammaCorrection, bool createDepth, PixelFormat depthStencilFormat);