M17 in HaOIIIRGB
M17 shows some very interesting featurs in it's nebulosity. There seems to be a 'blow out' to the left where you can see 3 shockwaves in the gass if you look careful. Furthermore the OIII part is extending quite far to the lower left. Further down in the lower left corner there are a few very thin OIII 'whisps' (which remind me of veil nebula).
Crop from 3 panel mosaic of NGC6602, M16 and M17