IF - not an issue. Look at the front shot after Vader is on the platform - it's illuminated from below - that means the platform is a little higher up than it appears to be. Now look at the side shot - all you can see is the chamfered edge of the platform - the illumination is out of frame. That means the edge of the meditation chamber steps are below frame also.

And even if they weren't below frame, it looks like there's a good four feet between the bottom step and the platform, so the bottom step could also be just out of frame on the left.