Synthetic populations in the eye of transit and direct imaging surveys. Top left: distance-radius plot of the 100-embryos population at 5 Gyr. The colour code gives the H/He envelope mass fraction. Planets without H/He are shown in black. Top right: distance-radius plot of the single-embryo population, also at 5 Gyr. Roman numerals show important morphological features. The colour code shows here the ice mass fraction in a planet’s core. Black points are planets that do not contain any ice. Bottom left: Apoastron distance versus absolute magnitude in the H band for the 100-embryos population at an age of 20 Myr. The colours show the planets’ mass. Bottom right: H band absolute magnitude as a function of planet mass and age. The isochrones of Baraffe et al. (2015) are also shown for comparison with grey lines.