2. Secondly, cut the toilet paper or toilet paper into a length and width consistent with the outline, and apply white glue or glue to a small area on the foundation.
3. Then, put the cut sanitary paper strips in the area that has just been coated with glue, and superimpose multiple layers of sanitary paper strips on the building height area to simulate the terrain fluctuation.
4. Finally, draw all the height levels with colored paper or watercolor painting. After the whole terrain model is completely dried, put it in a suitable position to observe and show the contour terrain model.