Hi all, the attributes 19.154 draw:extrusion-first-light-direction and 19.163 draw:extrusion-second-light-direction use a 3D vector. How are the axes of the underlying coordinate system orientated? Because these extruded shapes use the enhanced-path, I expect that positive x-values go right and positive y-values go down. But how is the z-axis orientated? MS Office seems to use for the similar solids in binary MS Office file formats and rtf file format a z-axis, which points to the observer. That means, that the coordinate system is a left-hand system. What is the orientation in ODF? Does someone know an application other than LibreOffice/AOO, that supports extrusion of custom shapes in ODF? To test the light direction extrude a circle and rotate the solid by 90 around x-axis. That turns the extruded faces so, that you can see, where the light produces the maximal brightness. From that you can conclude, whether a positive z-value is interpreted as being on side of the observer or on opposite side of the solid. Kind regards, Regina