
Okay, here is what I'd like to suggest: According to this thread, there doesn't seem to be a solution for my request as the engine doesn't seem to be able to handle that in different ways.
Currently, impassable lines only block solid actors but projectiles and hitscan move through them. The opposite are lines that block everything, actors, projectiles, hitscan. Now there is a linetype that I consider a mix between, the walkable midtexture lines. Interestingly, you can shoot through them with hitscan but they block projectiles and actors. For me this feels a bit inconsistent and I would expect a behaviour like the one for impassable lines.
Now changing this afterwards won't happen due to backward compatibility, but would it be possible to add a flag to actors, that makes them travel through walkable midtextures?
Why do I need them? Simply explanation: Rails. I am using rails like the one in the following screenshot:

I would like to be able to jump over them, but I would also like to shoot through them with a rocket launcher (for example).
I hope my suggestion is reasonable and I have the chance that this gets into the sourceport
