Creating Portal Neurotoxin Gas

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Portal Behind The Scenes Level Creation


This guide will teach you how to create neurotoxin gas.

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

Set the info_particle_system's name to home_neurotoxin_pipe_stream.

Creating the Vents

This part of the tutorial assumes you have completed the Creating Vents tutorial.

To do: Finish the rest of the guide

See Also