Actually, on this particular photograph, there's no filter at all. It's just a straight scan of a handmade print, done with a rather inadequate scanner. This, I think, accounts for the loss of detail, as the print I made is pretty sharp. Soon I should have a better scanner, and I may re-post some of these. Thanks.
Your portfolio has a real sensibility - high contrast, interesting views.
Only opionion, and this is just an opinion, would be to not have applied the charcoal or paint filter to the photograph - prefer to see the sharp details in your photographs.