Placing a .vrscene or a .vrmesh file in Chaos Vantage means to merge an additional .vrscene/vrmesh to an already opened one with the ability to position it where you choose.

To place a .vrscene/vrmesh drag n drop it into the viewport. While still holding the left mouse button a red arrow appears that indicates the position and surface normal at which it will be placed and aligned to.

Once you release the left button, a pop-up window appears with the Place option.

Merging a .vrscene or a .vrmesh file in Chaos Vantage means to merge an additional .vrscene/vrmesh to an already opened one and positions it at 0,0,0 coordinates.

When you drag-n-drop a .vrmesh or .vrscene file you choose Merge from the pop-up window.