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Adjusted vertices of subtractive brushes cause surfaces to disappear

I'm having a weird issue where I'll be creating hallways/rooms/etc through extruding surfaces on a subtractive brush from within a much bigger additive box. I'll leave that subtractive brush alone, go and make some more additive/subtractive brushes elsewhere that don't intersect with this original piece, come back and find that some of the extruded surfaces have stopped subtracting completely, or rather the resulting surfaces are not showing.

Example: http://puu.sh/7X3xi.jpg

Example: http://puu.sh/7XorA.jpg

After doing some more digging, it seems to be related to moving vertices. An old position of the vertices where they previously overlapped seem to leave behind a void of broken subtracting. Building geometry does not help.

Example: http://puu.sh/7Xooj.jpg

For this subtractive brush, the two left rear vertices used to be in the position indicated now by the gap. Both brushes are subtractive. Here's the 2nd subtractive brush next to it which doesn't seem to help any.

Example: http://puu.sh/7XorA.jpg

Any idea what's going on and how I can fix this? This is doing a swift job of breaking all my attempts at creating maps. Creating more complex brushes through extruding surfaces is now completely out of the question because of the certainty of this issue. At least when things break on one simple box brush, I can recreate it. But not so much for a brush with many surfaces.

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asked Apr 05 '14 at 10:48 PM in Bug Reports

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7minutesdead
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avatar image Adam Davis STAFF Apr 06 '14 at 02:03 PM

Hi 7minutesdead,

Have you attempted to rebuild geometry after this occurred? There are times when the geometry needs to be rebuilt to show the changes you have made to additive/subtractive brushes. Let me know if this works. Thank you!

avatar image 7minutesdead Apr 06 '14 at 06:15 PM

Yes I did try rebuilding geometry however the missing faces were unaffected.

Even stranger is if I copy and paste the more complex brush and move it to it's own area within the same additive brush, different faces will then be missing, but again even when I rebuild the geometry, everything stays the same.

avatar image Adam Davis STAFF Apr 06 '14 at 06:22 PM

Are you seeing a similar issue when using this in a new level with no other content? I have attempted to reproduce this with no effect thus far, can you provide reproduction steps that you are taking so I can test this on our end? Thank you!

avatar image 7minutesdead Apr 07 '14 at 01:11 AM

Sure.

Here's an imgur album explaining step by step.

http://imgur.com/a/yrtcY

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Hi 7minutesdead,

The pictures you posted did the trick! I have attached this as well as my findings to a bug report so that it can be assessed. Thank you and have a great day!

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answered Apr 07 '14 at 02:40 PM

avatar image 7minutesdead Apr 07 '14 at 05:42 PM

Awesome! Thank you.

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