Filamentary structures possibly associated with the four candidates: VFTS 385, 398, 470 and 581 (red circles). The background image is from the VLT HAWK-I K_s band and the four subplots on the right are K_s, 70 μm, 70 μm and Hα/Hβ (Lazendic et al. 2003) maps for VFTS 385, 398, 470 and 581, respectively. The black boxes in the main image correspond to the field-of-view for the subplots on the right, where the 70 μm subplots are larger due to their lower resolution. Different stretches are used to highlight the filamentary associations in the subplots.