BTS Light Sources

← Portal Behind The Scenes Level Creation

Introduction

This page will show and teach you how to create the light sources found in the Behind The Scenes Areas.

Warning:This page is incomplete, not a lot has been added.

SpotLight Lamps

SpotLight Lamps are attached to the wall, ceiling, and sometimes the floor.

The models used for light sources. Big Lamp is on the right, Small Lamp on the left

The point_spotlight and light_spot are placed in front of the model

Big Lamp

Create a prop_static entity set it's world model to models/props_wasteland/light_spotlight01_lamp.mdl this model is the lamp itself. The base model is models/props_wasteland/light_spotlight01_base.mdl disable shadows for both props.

Create a point_spotlight and enter the following Properties:

Property Name	Value
Color	250 240 205
HDR color scale	.7
Spotlight Width	80
Spotlight Length	Is how long the spotlight will go.

Create a light_spot and enter the following Properties:

Property Name	Value
Brightness	250 240 205 900
Constant	500000

Small Lamp

Create a prop_static entity set it's world model to models/props_wasteland/light_spotlight02_lamp.mdl this model is the lamp itself. The base model is models/props_wasteland/light_spotlight02_base.mdl disable shadows for both props.

Create a point_spotlight and enter the following Properties:

Property Name	Value
Color	250 240 205
HDR color scale	.7
Spotlight Width	32
Spotlight Length	Is how long the spotlight will go.

Create a light_spot and enter the following Properties:

Property Name	Value
Brightness	250 240 205 900
Constant	500000
Inner (bright) Angle	1
Outside (fading) Angle	25
Focus	0.5

Fans

• Creating Fans

Cage Lights

There are two different types of cage lights that appear in the Original Portal. The first seems to be a drop light and is hung from cables, and appears in the Rattman den of Test Chamber 16. The second is wall-mounted, and appears in the slimy tunnels in the huge turret ambush room before GLaDOS's lair.

Drop Light

Create a prop static with the world model models/props_bts/cage_light.mdl.

Put an env_sprite inside the model, and enter the following properties:

Property Name	Value
Render Mode	World Space Glow
FX Color (R G B)	250 240 205
Sprite Name	materials/Sprites/light_glow03.vmt
Scale	.5
Size of Glow Proxy Geometry	4.0

Next, create a Light_spot underneath the model. Give it the following properties:

Property Name	Value
Brightness	250 240 205 400
Inner (Bright) Angle	15
Outer (Fading) Angle	30

You may need to adjust the intensity and angles depending on the lighting needs of the area.

Then, create a system of cables in your room if there isn't one already, and hang the drop lights from them. You can try and align the small hook on the top so it looks like its hanging from the cables, and you can also just attach it to the ceiling where the keyframes meet.

Todo: Add more lightsouces

See Also

• Creating Fans

• Creating Vents

• Portal Behind The Scenes Level Creation

• Portal Level Creation