They add a visual component, which with 30 minutes of real world data, through a technique called Cross-Modal Supervision (CMS), is able to improve walking performance significantly!
They can even distort its vision (turn the camera) and it learns to adapt!
Paper: https://arxiv.org/abs/2211.03785
Advisor Presentation: https://www.youtube.com/watch?v=f6fDpKDxpL0
Note: This is not my work; I originally found the presentation above.