Question about HL map units

[ductonius]

Is it possible to have structures in maps that are fractions of a unit large. What I mean is, is it possible to have a wall thats 10 units long, 5 units high and 0.5 units thick?

I ask this becuase, as many of you know, the scale of the maps in HL2 can be changed to increase and decrease the size of the level. With a scale of 1 unit = 20 cm there is about 6^2 km (36 square km) of horizontal space. But does that mean that there can be no "structures" (walls, doors etc) thinner than 20 cm (1 unit)?

Thanks.

 

[Ti133700N]

For HL2 I have no idea (it would be a good question to ask to Gabe). In HL it's not possible to give a surface less than 1 unit thick. I also have a hard time tiling the textures on small surfaces. Some work with 0.1x0.1 (even though it's not a good idea) others don't with 0.4x0.4