Shipped with TRX as data/trx/ship/games/tr2/scripts/cut3.lua.
local suit_change_anim = 7
local outfit_changed = false
trx.events.after_control(function()
local lara_item = trx.lara.item
if lara_item.anim_num >= suit_change_anim and not outfit_changed then
trx.lara.outfit = "tr2_diving_suit"
outfit_changed = true
end
end)