Portal BTS - Tutorial - Air Ducts
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Contents
Introduction
This page will show you how to create ducts.
Traversable Ducts
These ducts can be seen in Rat Man dens and in escape_01 right before entering the Fan.
The Hole
Create a 64w*64h hole in your wall. Make sure your hole is at least 64 units long and interior face textures to metal/metalduct_bts_001.
The path
Create your path, areas should be 64w*64h.
Edges
Create 2 16w*64l*16h brushes with the nodraw texture.
Create 2 16w*16l*64h brushes with the nodraw texture.
Use the Clipping Tool to create a 45 degree slope for every brush.
Texturing
Align the textures. You can have half of the vent texture cut off. You can also set the Texture Scale X value to 0.1875 if necessary.
You'll need to align the vent edge textures to the path's textures. Make sure the slopes of the vent edges have the edge of the texture in between the slope and the interior face.
Vents
Add Vents as they are a useful light source.
Detail Ducts
These ducts are only seen once in escape_01 seen above the 6 pistons covering the turret room.
To do: Finish the rest of this guide
