Hi, Can anyone explain why I have to update all the camera''s x,y,z in order to move it forward as shown below : m_CameraPos.x += m_vVelocity.z * m_vLook.x; m_CameraPos.y += m_vVelocity.z * m_vLook.y; m_CameraPos.z += m_vVelocity.z * m_vLook.z; I thought I could just update the camera''s z position i.e. m_CameraPos.z += m_vVelocity.z; Kind regards, sTeVe