What is created by the association of visual and tactual local signs?

The association of visual and tactual local signs contributes to the perception of depth and three-dimensional space. When visual cues (like perspective and shading) are combined with tactile information (such as the texture of a surface), the brain is able to create a more complex understanding of the environment, leading to the perception of three-dimensionality.

This phenomenon highlights how our sensory systems work together to construct a cohesive experience of the world. By integrating these different types of information, our brains can interpret spatial relationships and object forms more effectively, enhancing our understanding of depth and volume in what we observe.

In contrast, a purely 2D impression lacks the richness of depth perception, while sensory overload refers to too much information being processed, which is different from the intentional integration of senses that leads to three-dimensional impressions. A visual illusion typically involves misinterpretation of 2D images that trick the brain, but does not involve actual depth perception.