It’s no longer heresy to say the West is done: explored, exploited, developed and digitally mapped, so that there’s little left to the mystery of it all. Majestic landscapes remain, of course, after a hard century of settlement, but the view is altered; a rearrangement that started, innocently enough, with split-rail fences and church steeples and more lately includes suspicious obstructions like drilling rigs and wind turbines. The scenery is still a tantalizing subject for artists, but they’ve had to adjust, too, painting into the landscape the new things that define it, and painting out the things that are gone, like abundant wildlife and unimpeded peaks. The best of it — and there is some of that on display now at the Curtis Center for the Arts — is journalistic, honest and a little detached.