[x64-2.9pre-1117-g5c182c7] Particles have wrong projection

[ZZYZX]

Example: http://i.imgur.com/3vbWVzK.png
The particles are supposed to make a smooth border around the portal. They are somehow rounded instead.

Minimal WAD to reproduce: http://www.mediafire.com/download/8y0j9 ... talgun.pk3
MAP01, use attack/altattack.

[Graf Zahl]

I wouldn't be surprised if this is yet another manifestation of the countless floating point related problems that are yet to be sorted out.

[ZZYZX]

Also apparently in 2.8 release the projection is a bit broken as well:
http://i.imgur.com/TtIN5GH.png

Although there it's only noticeable by looking up/down.

[Graf Zahl]

Needs to be checked if _mental_'s fix addresses this, too.

[_mental_]

Borders are now OK. Didn't post here initially, I was confused by missing visible part of portals.