Hello I have a problem with solid extruded from spline shape - in certain perspective view it is displayed with segments i.e. with very low resolution. When rendered with raytrace or smooth, it is ok, but in hidden line preview it is again distorted, same goes for rendered filled hidden line..., which I want to use for simple presentation... I guess it is something with design file units and their resolution, but can't get it. Whenever I want to change resolution, it would require to change the size of the elements, which I want to avoid (I've got setup views, etc...) Or is there any special setting for this? This happend with view modified by photomatch, several other perspective views do it as well, isometrich views are OK. Model is modeled in milimeters, advanced units say resolution 10000 per meter, solids 10000 kilometers, model is at coordinates aprox -36000,7000000, it is a construction site with dimensions aprox 170000x115000 mm Microstation 08.05.00.64 Windows x86 Thanks, Frantisek Stafek