Trees that grow from seeds start out as tiny seedlings, usually growing directly under the parent tree--the tree that dropped its seeds. Often, those seedlings die because they are blocked from receiving sunlight and moisture. However, seedlings raised in nurseries usually do very well, depending on the species of tree.
Italian Renaissance painters and architects including Filippo Brunelleschi, Masaccio, Paolo Uccello, Piero della Francesca and Luca Pacioli studied linear perspective, wrote treatises on it, and incorporated it into their artworks, thus contributing to the mathematics of art.
If the viewer looks at the image directly, it appears formless and amorphous. In order to recognize the image, the eye of the viewer must be positioned from a particular spot, generally off to the side, and from this point the image appears in linear perspective. Curvilinear perspective is an alternate to linear