Andreas, hast Du die Anweisung im Kommentarfenster gelsen?
1. Create mesh object using "Mesh Tool".
2. Modify the mesh object outlines and add/remove nodes as necessary.
3. Select the mesh object, in 3D parallel Projection setting, select top view with 270 azimuth.
4. In 3D view, save-as Library Object to any name.
5. Open the saved library object.
6. In 3D Script, delete all irrelevant lines before MASS command
7. Replace the wordings 'MASS "Grass", "Earth", "Earth",' (or other
material definations) with 'PUT' while retaining all the figures after this.
8. Delete also the 'BODY -1' command at the end.(see abctest3.gsm example)
9. Save the library object
10. Open 'Object Setting Dialogue Box' select 'Wave' object.
11. In the parameter box, replace 'abctest3' with the name of your saved object.
12. Now, create Fly-through and see the effect.
Wichtig ist vor allem Punkt 7: Ersetzen des Befehles 'MASS "Grass", "Earth", "Earth" durch ein "PUT".
Damm müsste es funktionieren. Ohne Put ist der Buffer (Put-Speicher) leer, so dass deine Fehlermeldung auftritt.