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Old 08-13-2002, 07:39 PM   #1
teutonicknight
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Exclamation Why no CSG Subtracting?

RichDiesal's tutorial on adding new rooms says that you should not use "CSG Subtract" Why not? Just curious....



"Unfortunatly, no one can be told what The Matrix is... you have top see it for yourself."

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Old 08-13-2002, 08:00 PM   #2
monsoontide
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If you ever try to use CSG subtract, you'll see it makes an ABSOLUTE BALLSUP of cutting up the object!!!
While it does make a hole, all the brushes making up the hole overlap horribly, which in-game causes a lot of graphical anomalies which are just plain unprofessional.
Also it takes so much time to rectify the problem afterwards, you're better of just building the thing properly from scratch.

Note: It is possible to create a single window in a patch curve - if you need a hole in a curved surface.

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Old 08-13-2002, 08:28 PM   #3
teutonicknight
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Ah... thanks, just wanted to know why..



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Old 08-13-2002, 08:34 PM   #4
Emon
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It doesn't always make fragments, infact most of the time it doesn't. Trying to CSG subtract with very complex shapes will create a mess, but if you're just trying to make a square recess in a wall, it's fine.


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Old 08-13-2002, 10:45 PM   #5
RichDiesal
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CSG Subtract is fine once you understand what it does and does not screw up. I would suggest not even trying it until you have made a map or two and understand Radiant at least intermediately.


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Old 08-14-2002, 12:02 AM   #6
monsoontide
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From my experience, anything that isn't square and at a 90 degree angle will cause problems! Just try making a hollow tube with CSG subtract! Ugh!
(Yes you can make one with a curve, but for certain situations it just isn't practical.)

Radiant tends to hate anything that isn't a big square block. Sigh!
That doesn't mean you can't be very creative in solving such problwms and finding work arounds.

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Old 08-14-2002, 12:39 AM   #7
teutonicknight
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Ah.. thanks for all the replys..... I will sleep well now....



"Unfortunatly, no one can be told what The Matrix is... you have top see it for yourself."

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Old 08-14-2002, 01:57 AM   #8
UniKorn
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Note that csg substract does not cut your brushes in the most optimal way. If you are creating a window in a brush, you will get a structure like this :
____________
|___________|
| |..............| |
| |..............| |
|_|________|_|
|___________|

while the optimal window would be

____________
|\ _________/ |
| |...............| |
| |...............| |
| |________ | |
|/_________ \|

not that good asci, but I think you'll get what I mean.
the second window has less T-junctions => better performance

PS : the points in the asci can be ignored, it was just to make it look right


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