Working ladders (GoldSrc)

GoldSrc

Source Engine

Source 2

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Ladders in GoldSrc are traditionally made using two entities:

• a func_illusionary with rendermode 4 and renderamt 255, for the visual representation of the ladder (usually with a clip brush around it if it isn't up next to a wall), and
• a func_ladder, for the climbable surface itself.

Ladders do not need to use func_ladder, however. Any SOLID_NOT entity with clipnodes can be made climbable. By setting the skin KV to -16, the func_illusionary itself can be climbed! Do note, however, that ladders shouldn't have more than one brush per entity, as multiple brushes will cause unpredictable results.