simple logwall with sealing - "tongue and groove" Features: 1. free movable 2d-view with movable hotspots - switchable 2. its possible to draw every single position of any tree-trunk at wall-beginning. 3. in ground-view there is a userinterface to switch tho ofte used settings 4. a polygon to cut contours - switchabele and free placeable 5. 10 free mavable rectangular cutouts - to place windows or else 6. sealing tongue and groove begin at wall crossingpoint 8. switch on simple measurements 9. begin with halften block or full in z-direction 10. implanted inaccuracy to get more reality in 3d-representation