3dAnarchy was the best 3d chat-and-build program I ever found. It got bought up by Adobe and had it's name changed to Atmosphere. It had the best lighting of any 3d-chat & build program I've ever tried. Unfortunately Adobe discontinued the program. Here's pictures of some of the worlds I made.

Ponds - I used a lot of 2d facer objects here which I made from pics found on the web.

Invisible Walls Maze

Animated Mosaic/Quilts - These were animated psychedelic patterns on a big screen in the world.

A House

Pot Smoking Lounge - There was no censorship of world content.

Some nice hash brownies and some cold drinks. Ahhh.

On the coffee tables there are joints, weed, etc.

High, come on in.

The bong show.

Strong Coffee

Strange topiary.

My recipe for very strong coffee.

A giant mug of coffee sits near a palm.

Lots of coffee for everyone.

River Ride - This was a 3d ride on a riverboat.

The ride takes you through a cave.

Mazes

The first maze is done in rainbow colours. Walk into portals at the end of each maze to get to the next level.

Be careful on the second maze. If you fall into the water it's game over.

Maze 3's portal is extra hard to find.

Finishing all 3 mazes brings you to a 'watcher's' level. You can see other people in the mazes on the checkerboard, but they can't see you. They just see the maze they're in.

Optical Illusions

Clickable boxes give explanations of the illusions.

If you stare at the spinning spiral, then look at the wallpaper, it will seem to move.

Illusions are grouped by category in different rooms.

Garden