"Fill the gaps with your mind" is very broad, and applies to lighting, pointillism, etc a divers lot of things that are not obvious to a non-painter. But Verme

"Fill the gaps with your mind" is very broad, and applies to lighting, pointillism, etc a divers lot of things that are not obvious to a non-painter. But Vermeer is next level, especially for the time. A growing contingent of historians believe he used camera obscura to achieve the results https://en.wikipedia.org/wiki/Hockney%E2%80%93Falco_thesis https://en.wikipedia.org/wiki/Hockney%E2%80%93Falco_thesis