  Using a combination of general-relativistic magnetohydrodynamics simulations
and ray tracing of synchrotron emission, we study the effect of modest (24
degrees) misalignment between the black hole spin and plasma angular momentum,
focusing on the variability of total flux, image centroids, and image sizes. We
consider both millimeter and infrared (IR) observables motivated by Sagittarius
A* (Sgr A*), though our results apply more generally to optically thin flows.
For most quantities, tilted accretion is more variable, primarily due to a
significantly hotter and denser "coronal" region well off the disk midplane. We
find (1) a 50% increase in millimeter light curve variability when adding tilt
to the flow; (2) the tilted image centroid in the millimeter shifts on a scale
of 4.4 microarcseconds over 11 hours (2000 gravitational times) for some
electron temperature models; (3) tilted disk image diameters in the millimeter
can be 10% larger (53 versus 47 microarcseconds) than those of aligned disks at
certain viewing angles; (4) the tilted models produce significant IR flux,
similar to that seen in Sgr A*, with comparable or even greater variability
than observed; (5) for some electron models, the tilted IR centroid moves by
more than 50 microarcseconds over several hours, in a similar fashion to the
centroid motion detected by the GRAVITY interferometer.
