private void DoClearCamera(Rect cameraRect)
{
float verticalFOV = this.GetVerticalFOV(90f);
float fieldOfView = this.m_Camera.fieldOfView;
this.m_Camera.fieldOfView = verticalFOV;
Handles.ClearCamera(cameraRect, this.m_Camera);
this.m_Camera.fieldOfView = fieldOfView;
}