DRD Team

Try the attached which is just a section cut out of the Zdoom Community map and a gldefs added. With me, if I have fog enabled (radial or standard) the glowing flat effect flickers on any side def it touches as you move around the level. This does not happen with the most recent official release.
In case you can't see it, I have tried to capture the effect in a video but video compression makes it hard to see. I can't upload huge files so this video is a bit short because I used minimal compression to try and get some clarity - and even then its a bit blurry - and so had to keep it short.

http://www.rowand.myzen.co.uk/graf/glow.wmv

[edit] r663 seems OK. I think the problem appeared with r664 [/edit]

Fixed. Also fixed another glow problem which this map clearly showed: Depth fog and glows were applied in the wrong order. To have this look correctly fog must be done first before applying the glow.