closure
The perceptual phenomenon you are referring to exists in pattern perception, and is referred to as seeing a subjective contour.
Perception is when you fill in the gaps with what your senses tell you.
The rule of closure in perception refers to our tendency to mentally fill in gaps in incomplete images to perceive them as whole. This principle allows us to perceive incomplete or fragmented information as complete patterns or objects. It helps us make sense of unfamiliar or partial stimuli by organizing them into recognizable forms.
The perceptual tendency to fill in gaps in order to perceive disconnected parts as a whole object is called "closure."
the distance around a figure is called
This phenomenon could be attributed to an optical illusion or fleeting visual impression. It may be the result of your eyes' slight delay in processing information or the brain's tendency to fill in gaps in perception.
The process is called Diffusion. This is why when you spray air freshener in a room it will eventually fill it.
The fill command may just fill to the boundaries
Diffusion
This is called "perceptual completion" or "filling in the gaps." It is a cognitive process where the brain uses context and surrounding information to fill in missing pieces of a visual or auditory stimulus to create a coherent perception.
take a jar and fill it with water. then put the figure in the water and measure the difference in height of the water.
You must provide us with the shape and dimensions of the solid figure.