The chamber exterior system is going to replace the old 3D skyboxes and bottomless pits. The aim is to build a map around the PeTI chamber for BTS or Old Aperture enrichment spheres. This is a long list of features that this system needs to have.

Chamber exteriors are not currently being worked on, but are planned for the future.

List is a WIP and subject to change

• Generate realistic supports
  • Add a SupportChance value, specifying how common supports will be
  • When placing wall edges, check supportChance and add the origin to a set
  • Corners and pillar sections always have supports
  • Triple pieces have the support on the adjacient tile.
  • Generate 1 support per block, facing random direction
• Background elements
  • Partition the map area into a 512 grid. Extend down an additional 6 spaces, sideways and up 2 (based on how large the map is.)
  • Invalidate each grid section which is occupied by a brush.
  • Also invalidate any pos occupied by an instance - ambient lights are placed every 512 units, so interior blocks aren't occupied
  • Now start placing instances (in skybox) to fill grid sections - BackgroundChance /100 if a space is filled
  • Instances might also occupy a region below - loop from top to bottom when placing, so they don't overlap - need to define for each file their height.
• Wiring
  • Choose a random pit side (WireChance /100 per each side )
  • Move in the direction of the normal (up to 2048 or so units) looking for the opposite pit brush
  • Choose z-heights for both brushes (some distance below )
  • For both brushes, check if they have a support
    • If so rope position is the center, ±32
  • Otherwise look back 1 512 grid space, to find grid instance
    • If found rope position is ±200 units from center of support, otherwise abort adding rope at these pos.
  • Place move_rope and keyframe_rope, add keyvalues to position. Width range configurable. Slack = dist between + random slack value (configurable max/min)
• Vactube generation
• Catwalk generation
• Support system generation
• Entrance and Exit elevator placement systems
• Exterior paneling system to make the outsides of chambers look nicer
• Dynamic nodraw system to cull faces that can't be seen by the player
• Dynamic item extensions (vactubes that lead to droppers, etc)
• Extended random tiles below chamber (like in mel)

Clean

• A chamber warehouse filled with other test chambers, vactubes, and catwalks

Overgrown

• Everything outside the chamber isn't powered. Only lights should be sunlight from above the chamber.

Wheatley

• As seen during the funnel ride to whealtey boss fight

Portal 1

• A mostly open pit with an orange glow of heat emanating from below with occasional vactubes and pipes around the place.

Old Aperture

• An enrichment sphere filled with scaffolds, stadium lights, pipes, and themed bts elements depending on the style.
• An open enrichment sphere showing bts outside like a large fan or more enrichment spheres