To make perfect conversion from sketchup:
1. Cleanup your map, texture it
2. Rename all textures, use correct size and format (as noted above)
3. While exporting 3ds from skethup uncheck options
generate cameras from pages and
export standalone edges
4. Import 3ds in Max, do render, export ase with settings noted above
5. You should see almost no errors in importing ase and converting
6. Move textures to new folder tiffrgb and only then process conversion
7. import ase file to plathing2 (do scale by .004), reset the view (option is somewhere around in menu), edit each texture's true color to white
8. download file i noted above, edit it and try map ingame (add map image for minimap to work, opponent paths for them to not be stuck - read tutorials, write new start position if default's not good (test location yourself - don't start outside

))
Note: These steps worked for test sketchup map i created. Later i'll create new good map.