In near-infrared, the same blue-and-red wall is illuminated by Doc's incandescent bulbs. It clearly shows a shaded honeycomb pattern.

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   merlin / alex glow (alexglow@chaos.social)'s status on Thursday, 21-Nov-2024 16:42:31 JST merlin / alex glow

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   Another fun thing about near-IR is how it can "see through" things – because paints and pigments are designed to reflect/absorb the visible spectrum. Sometimes clothes seem translucent (eep!); sometimes hair dye is invisible; sometimes you can glimpse the beehive pattern of a bygone façade.