This module allows to pass through players. Modified version from Semiclip by s1lent.
I have made the necessary changes to make it work on Half-Life, currently it supports the following options.
Semiclip works for everyone. (Useful in KZ/Bhop servers)
Semiclip only for teammates of BLUE team.
Semiclip only for teammates of RED team.
Semiclip only for teammates of every team (HL handles up to 10 teams).
Allows jump to crouching players when semiclip works;
Fixed jamming on mobile platform (a global problem on DeathrunMod).
Intersecting players can take damage.
Move all files from archive semiclip.dll | semiclip_mm_i386.so to folder /valve/addons/semiclip/
Open /addons/metamod/plugins.ini and insert path to the meta-plugin according to your OS:
# semiclip 0|1 disable/enable semiclip.
# team 0|1|2|3
# - 0 Semiclip works for all.
# - 1 Semiclip works only for BLUE team.
# - 2 Semiclip works only for RED team.
# - 3 Semiclip works only for teammates.
# patch 0|1 Fix jamming on a mobile platform. (A global problem on DeathrunMod)
# crouch 0|1 Allows jump to crouching players when semiclip works.
# effects 0|1 Effect of transparency of the player. Depends from distance between players.
# distance 0|200 At what distance player can have transparency and semiclip.
# transparency 0|255 transparency of the player.
You can see it work starting from minute 1:15. Whenever I can I will upload more footage and showing directly his features.