DRD Team

I think this may have always been the case but it is more noticeable with newer versions because of the improved fog effects. Particles seem to "flicker" a bit in foggy sectors when you move. If you use the WAD that I posted in the decals thread over at Zdoom

http://forum.zdoom.org/viewtopic.php?f=2&t=23869

and make sure you have blood set to use particles, summon something pretty big (I used a mancubus) into the foggy half then shoot him with something that generates a lot of blood (eg the SSG) you should see the effect. It can be done with freeze mode on so that makes it easier to spot. It's not just blood that does it though, I initially spotted it with an enemy that has a railgun.

Now, why did nobody ever notice this one before...

A possibility is that Enjay is the only one using those fugly particles

The other one could be that the glitch didn't look abnormal enough.

To be honest, I could use more people like Enjay who consistently pushes the engine and reports bugs.

Yep, but unfortunately (for GZDoom) ZDoom is getting most of the attention these days, so finding another talented engine fiddler wouldn't be easy.