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CT Scans
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Aug 8 @ 5:23pm
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CT Scans

In 1 collection by Valve Artists
Valve Environments Collection
24 items
Description
Here is a small selection of CT scans produced using an industrial CT scanner. Capable of extremely high resolution scans, it produces gigabytes of voxel data which has been converted into simpler 3D models capable of being rendered in real-time on your GPU.

Some technical details: CT scanner was a GE Phoenix V|tome|x S X-Ray Machine with dual 240kV and 180kV tubes and the larger DXR 400mm detector, the 180kV tube being used for the insect scans since they are mostly homogeneous in density, and the lower power tube produces smaller voxel sizes.

Scans were processed in VGSTUDIO MAX, generating model geometry relatively close to that seen in VR, with additional triangle reduction done in MeshLab. Displayed scans are roughly two million triangles each, with the vacuum tube and bumblebee scans both involving two separate models generated at different density levels - the lower density model being rendered as transparent.

Model vertex colours were generated in MeshLab using the volumetric obscurance filter followed by various colour adjustments. This makes interior structures vastly easier to 'read' visually while still being quite inexpensive to render - there's a checkbox to use vertex colours in the material parameters.

The near clipping effect is set via a Lua map script loaded on startup - in this case scripts/vscripts/map_scripts/ct_scans.lua:

function Activate( state )
ListenToGameEvent( "player_spawn", OnPlayerSpawned, nil )
end

function OnPlayerSpawned( entityIndex )
local player = PlayerInstanceFromIndex( entityIndex )
SetNearZ( player, 14 )
end


If you have any questions, once again please don't hesitate to ask in the comments!
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34 Comments
PROTRIX Nov 20 @ 4:06am 
sus
NanoBeef Sep 28 @ 1:59pm 
oO ???
npc_maned_wolf_flying Sep 20 @ 7:00am 
what the fuck
TrainzMarcel Aug 28 @ 6:23am 
computer bug go wrrr
its_Ev4(ita) Aug 28 @ 5:24am 
forza roma
:steammocking:
its_Ev4(ita) Aug 28 @ 5:23am 
gg
GʁaṗhiↃ Aug 28 @ 4:30am 
urrrgh
WeeWDiedrich Aug 27 @ 6:57pm 
thanks for the dead bugs valve
GANJA JOE Aug 27 @ 5:19pm 
LETS SCAN THIS BUG BOIS!
Weezer Salad Aug 27 @ 12:14pm 
lol cool but why??