Creating Portal Neurotoxin Gas

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Introduction

This guide will teach you how to create neurotoxin gas.

Note:For anyone who wants to complete this page, please finish Creating Vents because the neurotoxin vents in the boss fight room are the exact same shape as the normal vents seen throughout the BTS areas.

Creating the Gas

Create an info_particle_system and set it's particle to human_cleanser. Set its position outside the vent.

Note:If your gas must activate instantenously on map spawn, then make sure you set the Start Active keyvalue to Yes.

Give your info_particle_system a name, for example: human_cleanser_particle. This section of the tutorial is complete.

Creating the Vents

This part of the tutorial assumes you have completed the Creating Vents tutorial. If not, you can use an overlay(not recommended).

See Also

• Portal Behind The Scenes Level Creation

• Portal Level Creation

• Creating Vents