Excursion Funnels and grates
Ok, so just put the starting length of the funnel behind a big grate, or glass with an aim hole.
yes but if the aim is to create an obstruction that can be removed, surely a lightbridge will be more understandable? i think that would work better, personally..
I think in terms of boolean variables. Generally, it makes things easier.
yes but if the aim is to create an obstruction that can be removed, surely a lightbridge will be more understandable? i think that would work better, personally..
Why don't you just use a Thermal Discouragement Field? adds a bit off danger to the obstacle 
yes, but that wont block objects as well as the payer...also, it would be frustarting for any sort of timed puzzle.
I think in terms of boolean variables. Generally, it makes things easier.
it effectively blocks the player by... killing them. Player: blocked!
[spoiler][SP] Alternate[/spoiler]
it also blocks objects by...letting then through completely unaffected! which was my point!
I think in terms of boolean variables. Generally, it makes things easier.
Just use a playerclip brush and a func_clip_vphysics in the same place as your non-solid brush textured with the grate texture.
[spoiler][SP] Alternate[/spoiler]