The most significant indicator is that the VLM stores lighting in a very sparse grid and just interpolates to the nearest probe without any occlusion, so it leaks light through walls. Low spatial resolution also means it can’t capture any meaningful lighting detail such as the indirect shadows from the sphere/pillar on the floor.
You can’t see the rest of the scene but there is light leaking in the reflections on all of the walls, and the ceiling.
Here’s a much more obvious example:
