@ Framiga
He probably cut the PPC board out from whatever digital photo or scan he had of it, and pasted it on the purple background. When he saw that the marquee tool had left him with angular edges on the round edge of the capacitor he probably blurred it.
Well, we know that he's a rough cut 'n paster now. See also the north edge of the board: there is a light blurry band on it, also from a cut 'n paste job.