<function name="Add" parent="halo" type="libraryfunc"> <description> Applies a "halo" glow effect to one or multiple entities. <warning>Using this function outside of the PreDrawHalos hook can cause instability or crashes.</warning> </description> <realm>Client</realm> <args> <arg name="entities" type="table">A table of entities to add the halo effect to</arg> <arg name="color" type="table">The desired color of the halo. See &lt;page&gt;Color&lt;/page&gt;</arg> <arg name="blurX" type="number" default="2">The strength of the halo&#x27;s blur on the x axis.</arg> <arg name="blurY" type="number" default="2">The strength of the halo&#x27;s blur on the y axis.</arg> <arg name="passes" type="number" default="1">The number of times the halo should be drawn per frame. Increasing this may hinder player FPS.</arg> <arg name="additive" type="boolean" default="true">Sets the render mode of the halo to additive.</arg> <arg name="ignoreZ" type="boolean" default="false">Renders the halo through anything when set to true.</arg> </args> </function> <example> <description>Adds a halo around all props in the map using an O(n) operation and iterating through unseen objects which can be extremely expensive to process.</description> <code> hook.Add( "PreDrawHalos", "AddPropHalos", function() halo.Add( ents.FindByClass( "prop_physics*" ), Color( 255, 0, 0 ), 5, 5, 2 ) end ) </code> <output> &amp;lt;br&amp;gt; &amp;lt;br&amp;gt;All the props on the map will be rendered with a red halo, a blur amount of 5, and two passes. <image src="halo_example.png" alt="_halo_example.png"/>&amp;lt;br&amp;gt;All the props on the map will be rendered with a red halo, a blur amount of 5, and two passes. </output> </example> <example> <description>Adds a green halo around all admins.</description> <code> hook.Add( "PreDrawHalos", "AddStaffHalos", function() local staff = {} local i = 0 for _, ply in ipairs( player.GetAll() ) do if ( ply:IsAdmin() ) then i = i + 1 staff[i] = ply end end halo.Add( staff, Color( 0, 255, 0 ), 0, 0, 2, true, true ) end ) </code> </example>