A small scene with 2 area lights constrained to 2 balls.

You can move each light or each ball. The light face always the target ball.

You can use every light type.

To be universal you have to name the target with the name of the light + " Target"

Once selected a light, you can use two variants: 1 to activate the constraint, and the other to remove it.

A VRED sample scene with 2 HTLM menus.

Built from the standard VRED sxamples. The circular Menu needs to be linked somewere, while the other could be inlined in the VRED Scene

Vred complete scene to use with the Youtube tutorial

https://youtu.be/DhMSRQek1yk

How to add realism to a camera view in VRED.

Video Link

Simple scene that sows how to manage the position (rotations, translations) syncronization when constraints are not possible

Video Link