Hi,
Thanx for your answer!
I’d like to track the sides with the letters, not the other sides.
I used your tips, but it didn’t work for me. In the following example, the cube moves upside, but the spline stays on the same hight as before. It only moves a little bit to the foreground.
First frame:

Second frame:

These are my spline, surface, grid and settings:
Spline:

Surface:

Grid:

Settings first try:

Settings 2nd try (including ‘shear’):
