...So I've been experimenting using sifted dirt over the painted Sculptamold, using diluted white glue, then later spraying with diluted matte medium to seal it.  The problem is that the dirt is significantly darker after it's glued down.  I thought it might be the matte medium, so I left that off.  Then I thought that maybe it was the dilution of the glue, so I reduced the water until, finally, I was using just straight glue.  That seemed to help somewhat, but the glued-down dirt still has a mottled, darker-than-natural color.  What am I doing wrong?

did a small snow scene test on wet fusionfiber tinted with a mix of grey and brown.  trying for a heavy "dusting" look.

Place silfor tufts on fusion fiber then used strainer with Noch Snow.  No misting with wet water after adding snow. The track marks were made using a palette knife on the wet snow fusionfiber mix.  After drying the excess snow on tufts was blown off.

As I'm creeping towards completion of my roundhouse I still have no good idea about the roof. What kind of roof should I use? What's prototypical for an American roundhouse and easy to model in N scale? Here is a picture of the structure in question as it looks today:

I've known for years that you could get plaster cloth cheaper than the Woodland Scenics stuff down at your LHS but those cheaper sources of supply aren't always convenient.  Today in our local Hobby Lobby I found the same size roll as the WS in another dept. besides hobbies. I forget where but I know it was in the same aisle as the candle making supplies.  Anyway, it was $2.50 cheaper than the  WS stuff about four or five aisles down in hobbies. With my trusty 40% off coupon, I got out of there with a roll for less than six bucks.

Regards,