You excuse me Martin but I think that he is simpler set the question in this way: Your bump map in poser works correctly or to the "Escher-way" mistake the highlight? (you too see the others my two tests at Subject: Re: Bump bug resolution www.renderosity.com/messages.ez?Form.ShowMessage=453188 The differences of the conversion between mac and pc and of the direction of the light are creating confusion! However, to answer Roy, when poser mistake, it always mistake any it is the direction of the light (except the vertical one simple) and of the camera.