Update Bounce3DView to look more "steampunk"

[ClintStaley]

Let's update the Bounce3DView to look more appealing.

1. Materials

• Brass, brushed
• black enamel
• Wood, coarse oak-grained
• Steel, shiny
• brick
• plaster

2. Surrounding room

• coarse oak floor
• brick walls
• plaster ceiling
• 5m deep, 12m tall, 14m wide
• Rig is at back of room, centered 1m from back wall.
• .5 wide slot in floor of room centered on rig, into which mis-fired balls may fall. Sides of slot are also brick, with wood floor perhaps 10cm thick.
• 2m to right and left of rig. Slot extends through this area, and 10m up both walls (the max height a ball might hit those walls.

3. The rig
   • brass targets, extended from back wall 8cm diameter steel rods, with 1cm "collar" at attachment to target, and 4cm ring at wall in which rod "slides". Targets are centered 1m from back wall, and retract back to wall when hit.
   • black enamel obstacles, extended on steel rods like targets, but not retracting.
   • targets and obstacles are 10cm deep, with width and height determined by the problem.
   • meter long brass "cannon" that fires balls. Muzzle centered at top left of rig, 10m above floor.

[ClintStaley]

Looking nicely steampunk. Thanks.