OMFG}
I repeat again:
To make a walkway, that you can shoot through, and you can walk on, you need a texture, try: {GRATE2A
Now make a brush (block/rectangle/whatever) and texture it with that tex. Select teh brush, click on To Entity on the right hand side of Hammer, select : func_illusionary, in the menu below it's name, go to:
Render Mode <- change it from 'normal' to Solid
and also:
FX Amount <- change it to 255
Now Exit the entity.
Make another brush in exactly the same place as teh func_illusionary, and texture it with the texture called by the name of:
clip
To find those textures, look in the halflife.wad, and use the Filter bar at the bottom.
Anything textured with clip means the player can't move past it, but it is invisible in-game, and bullets can go through it.
If hammer just closes it's usually a problem with say.. an FGD, get an up to date one form VERC.
Follow teh hamemr set up tutorials properly in teh first place and there will be no problems.
read tutorials about how to do this kind of thing.
Please.