Sneak Peek Image - Dock Walkable (Patreon)

When looking at this version of the dock, you can see that it's built upon a foundation. This is the only reason that Sims can walk over it.

Don't expect that you can click on the dock and see a "walk here" interaction though. There are 2 ways to make them walk over it:

1: Extend the foundation on the water side over the dock, so you can tell your Sims to walk to that spot. Sims have to walk over the dock to reach it.
2: Use the Sims 4 Teleporter. Place it somewhere on the dock, teleport your Sims to that spot and watch it walk over the dock when returning back to the beach. (I will release a Sneak Peek video of this tomorrow)