I've attached a zoomed in portion of the dorsal intake below. The discontinuity is very clear, between the lighter blue portion jutting out, and darker outline of the intake manifold. The part jutting out is what we are talking about (some kind of hatch, person, etc.)What specific hatch are you and others talking about? Because I've been looking at the images and there's nothing which stands out
As for the slats, I agree it is more likely that it is part of the hangar/wall/background. But the "leakage" into the white part is likely image artefact or software issues.
There definitely is white camouflage on both the left and right sides of the J-36's dorsal airframe... The white camouflage on both sides of the J-36 are asymmetrical in shape, but they are definitely there.

As for the white camouflage, there is a section of white on the left, but it is much further back, and is a straight (nearly) band, not some complex blob as would be required for the silhouette to include the part that juts out (see below)
