UDMF projectile/missile triggered line specials

[FDARI]

Hi
I am trying to replicate Strife-style breakable windows.
A functional description of what I am trying to achieve:

Layout:
2 rooms sectors with 1 window sector inbetween
Window sector split by single linedef referencing the same sector on both sides
Splitting line represents glass, set on middle texture

I am able to work with line ids, translucency, texture changes and shard spawning using both Doom in Hexen format (with setlineid + script 1 enter {} initialisation) and UDMF, but would obviously prefer to work with UDMF, where most properties are set directly and not by init-scripts.

There is, however, one thing I can do in Hexen that I have not figured out in UMDF:
Triggering line special upon hitscan attacks crossing the line without impact.
The second-best solution works: Making the window block everything and trigger on projectile impact instead of missile crossing, but I would prefer that the projectile/missile which shatters the window passes unhindered, rather than stopping dead in the "glass".

(Missile tests with rocket launcher and plasma gun trigger projectile/missile crossing specials; projectile tests with shotgun and pistol only trigger impact specials in UDMF as far as I can tell, while in (Doom/Hexen format) all weapons seem capable of excuting the trigger for projectile impact OR crossing line.)

[Graf Zahl]

You need to make it triggerable by both missile crossing and impact. In UDMF trigger types can be freely combined.

[FDARI]

Have I ever... Now that I applied that I realise that combining those two triggers is exactly the same as the single Hexen trigger. Additionally, I find that it works. I suppose this means that hitscans never cause line-crossing effects, but cause impact effects even when projectiles are not blocked.

Thank you.

[Graf Zahl]

That particular trigger type in Hexen format maps always was a combination of these 2 types so it made no sense to have a separate trigger flag for it in UDMF.