  Galaxy morphology is a powerful diagnostic to assess the realism of
cosmological hydrodynamical simulations. Determining the morphology of
simulated galaxies requires the generation of synthetic images through 3D
radiative transfer post-processing that properly accounts for different stellar
populations and interstellar dust attenuation. We use the SKIRT code to
generate the TNG50-SKIRT Atlas, a synthetic UV to near-infrared broadband image
atlas for a complete stellar-mass selected sample of 1154 galaxies extracted
from the TNG50 cosmological simulation at $z=0$. The images have a high spatial
resolution (100 pc) and a wide field of view (160 kpc). In addition to the
dust-obscured images, we also release dust-free images and physical parameter
property maps with matching characteristics. As a sanity check and preview
application we discuss the UVJ diagram of the galaxy sample. We investigate the
effect of dust attenuation on the UVJ diagram and find that it affects both the
star-forming and the quiescent galaxy populations. The quiescent galaxy region
is polluted by younger and star-forming highly inclined galaxies, while dust
attenuation induces a separation in inclination of the star-forming galaxy
population, with low-inclination galaxies remaining at the blue side of the
diagram and high-inclination galaxies systematically moving towards the red
side. This image atlas can be used for a variety of other applications,
including galaxy morphology studies and the investigation of local scaling
relations. We publicly release the images and parameter maps, and we invite the
community to use them.
