models/bots/boss_bot/carrier.mdl1960 × 1340 × 1750
Clowncar of mechanical doom. Use also: models/bots/boss_bot/carrier_parts.mdlmodels/props_mvm/dome_roof.mdl11226 × 11758 × 3693
Several large black polygon "background walls" around the edge, along with "cave" background area.models/props_hightower_event/underworld_lava.mdl8446 × 17182 × 7797
Animated lava sheet with lava fall.models/props_lakeside_event/fog_plane01.mdl8133 × 17563 × 1745
Skycard-style green fog whisps. Ten parallel layers, five on each side.models/props_viaduct_event/fog_plane01.mdl8133 × 17563 × 1745
Skycard-style blue-purple fog whisps. Ten parallel layers, five on each side.models/props_hightower_event/underworld_fogcards01.mdl5524 × 12445 × 1626
Skycard-style firey fog whisps. Six parallel layers, three on each side.models/props_lakeside_event/vortex_lakeside2.mdl6232 × 6368 × 2037
Green fog/energy vortex. Skybox-scaled variation exists in library. (models/props_lakeside_event/vortex_lakeside.mdl)models/props_viaduct_event/spooky_tree_cards01.mdl911 × 4383 × 1556
models/props_viaduct_event/spooky_tree_cards02.mdl716 × 6284 × 2283
Full-scale black silhouette dead tree skycards. (01 shown)models/props_viaduct_event/skull_island01.mdl1036 × 1622 × 1265
Eyeaduct underworld skull.models/props_urban/urban_skybuildings.mdl8263 × 4705 × 2448
Full-scale building cluster for non-skybox background decoration.models/props_urban/temp_tower02.mdl2217 × 1491 × 6534
Untextured skyscraper. Could be used in the distance when heavily fogged.