1. navigaiton controller in the lerge scene set.
long years ago, I learned vrml. it was not so easy to make complex scene,
but there are viewer to navigate scene easy. . (it was like a simple game,,)
eg in the big building or scene
a) user check where is good point about the scene prop by scene exprorer viewer
user can easy , foward run turn left turn light, or if you want you can point out the place from small scene map.
if click the place, user view translate at once .
b) translattion assets or subsets where the user point at in exprorer window.
think about make scene in the cave, first I use exproer navigation window, by easy controller foward back left right
as if I am exprolering the cave with camera, like game.
after find good place for render , point out by mouce pointer,
then translate the figure or subsets or light sets by one click.
then change viewer from exproler viewer to ds 3d viewer.
adjust light etc,,