The phrase "dreamlike atmosphere" means that the surroundings or environment evoke a sense of being in a dream. It suggests a surreal, ethereal, or otherworldly feeling. Full definition
Scale is frequently arbitrary and non-perspectival, which adds to an overall dreamlike atmosphere; the spatial relationships construct their own imaginary realm. (artspace.com)
It has a really particular dreamlike atmosphere and I found that really fascinating. (collider.com)
Scale is frequently arbitrary and non-perspectival, which adds to an overall dreamlike atmosphere; spatial relationships seem to construct an imaginary realm all of its own, one which both defies logic and feels somehow familiar. (davidzwirnerbooks.com)