Atmospheric C/O, O/H, and C/H of planets forming in disks with different α viscosity at different initial positions after 3 Myr of evolution. The dark regions correspond to planets that have not reached masses above 100 Earth masses. We note that planets growing in disks with higher viscosities migrate farther and are generally more massive than planets growing in disks with lower viscosities (Schneider & Bitsch 2021a).