Lua, 453 characters
s=io.read("*l")x={}for v in s:gmatch("-?%d+")do x[#x+1]=tonumber(v)end m=math
u=unpack s=string c={s.byte(" __ /__ /||###|#||___|/ ",1,28)}t=m.max(0,u(x))-1
b=m.min(0,u(x))l=#x*4+3 a={}for n=b,t do for p,v in ipairs(x)do y=n<0 and v<=n
or n>=0 and v>n for i=1,4 do e=(t-n)*2+i a[e]=a[e]or{}for j=1,7 do
d=c[(i-1)*7+j]f=(p-1)*4+j a[e][f]=y and d~=32 and d or a[e][f] or 32 end
end end end for i,v in ipairs(a)do print((s.char(u(v)):gsub("#"," ")))end
