RDX has wavy sculpting on the sides that mimics large-scale corrugation.  

The nose of the RDX is its most distinctive feature.   The grille is a wide shallow vee below an equal-depth bright trim panel, the Acura theme, with flush-mounted side grilles and fog lights, and a dark panel in the center that appears to offer lots of snow-bank clearance.  

Behind the C-pillar there's a small window not easily discerned because the C-pillar is black and the window is tinted so darkly.   From the inside, it affords good visibility, with no major blind spots when looking over your shoulder.  

Between the redesigned taillights is a trim molding that almost combines Acura's bold grille and five-angle themes.   The lower bumper area is blacked out and the tailpipes capped off with oval outlets.