Top: gravity in comparison to radiative force for varying stellar cluster size in the M6 C6 model with a constant temperature of T = 20 K and an outer radius of R_out = 5 pc. Vertical dotted lines give the FWHM of the Gaussian spatial distribution of the cluster, with values 0.1, 1, 2, and 4 pc . Middle: grain-size averaged dust temperature distribution for the M6C6 model dependent on the different FWHM. Bottom: same as the top panel with the radial dependent dust temperature shown in the middle.