  We present redshift-zero synthetic dust-aware observations for the 45 Milky
Way-mass simulated galaxies of the ARTEMIS project, calculated with the SKIRT
radiative transfer code. The post-processing procedure includes components for
star-forming regions, stellar sources, and diffuse dust. We produce and
publicly release realistic high-resolution images for 50 commonly-used
broadband filters from ultraviolet to sub-millimetre wavelengths and for 18
different viewing angles. We compare the simulated ARTEMIS galaxies to observed
galaxies in the DustPedia database with similar stellar mass and star formation
rate, and to synthetic observations of the simulated galaxies of the Auriga
project produced in previous work using a similar post-processing technique. In
all cases, global galaxy properties are derived using SED fitting. We find
that, similar to Auriga, the post-processed ARTEMIS galaxies generally
reproduce the observed scaling relations for global fluxes and physical
properties, although dust extinction at FUV/UV wavelengths is underestimated
and representative dust temperatures are lower than observed. At a resolved
scale, we compare multi-wavelength non-parametric morphological properties of
selected disc galaxies across the data sets. We find that the ARTEMIS galaxies
largely reproduce the observed morphological trends as a function of
wavelength, although they appear to be more clumpy and less symmetrical than
observed. We note that the ARTEMIS and Auriga galaxies occupy adjacent regions
in the specific star formation versus stellar mass plane, so that the synthetic
observation data sets supplement each other.
