Topic: concept art in need of c&c

[blackbird™]

I know  it looks kinda shabby but its done entirely in paint!
And will someone please help with shading or give me  link to a good shading tutorial?
Thanx
Blackbird

[Michael Zhu]

Nothing wrong with the perspective. If you add some more tones of the colour you currently have, you've got one sweet pic on your hands, blackbird. The curve on western door should be slightly skewed down, but that's not really a concrete criticism.

[blackbird™]

thanx i'll post the completed pic within a couple of days

[Mage]

a lil' edit

here's what i've done :
shortened the window on the left
adjusted perspective on the 2 rightmost windows and door
added a shade to the orange things on the roof
and added a little more grey shading here and there

btw.. is that sign saying hi or is it just my imagination ?

[blackbird™]

Very sharp mage very sharp
Indeed it's saying hi