It is important when using SteamVR and lighthouse tracking that reflective surfaces in the mocap environment be covered or removed.

• Avoid reflective surfaces, glass, polished metal, glossy paint, chrome plating, smooth plastic surfaces, high gloss wood or tile floors.

I use masking tape to cover many of the reflective surfaces in the room. Masking off shiny switch/outlet covers and chrome plated doorknobs, etc.

Especially important is to mask off any shiny objects that are at high elevations, for example this chrome plated lighting fixture that was located in the center of my playspace would sometimes cause noticeable tracking errors from the highly reflective surfaces. covering the the polished surfaces with masking tape drastically improved the overall quality of the tracking!

Glass surfaces are also extremely reflective (this includes PC towers) and can cause VR trackers to appear to flip out or fly away randomly due to reflections causing tracking errors!

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It's important that trackers and receivers have a clear line of sight. For this reason I have placed all RF radio dongles near the ceiling:

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This is the fixture I created using two strips of plastic and hot glued the dongle 'docks' to them. The antenna array is mounted to the ceiling for best line of sight to the receiving trackers and keeps it away from inductive surfaces such as a metal PC case. (don't mind the DLP projector, it's not part of the mocap system!).

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Another consideration if using many multiple body trackers is to ensure no data throughput bottlenecks are caused by placing too many receiver dongles on a single USB controller.

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I use two USB 3.0 hubs connected to a dedicated USB3.0 PCIE card with proper USB3.0 cabling (eg. two Blackweb BWA17HO010 hubs).

The 'antenna array' is located such that it is directly visible from all parts of the room and is away from any large metallic objects to avoid attenuating the signal.

I use the Inateck 2-Port USB 3.0 PCI-Express Card (KTU3FR-2O2I) as recommended for use with the Vive.