Sacred Texts  Age of Reason  Index 
IV. Perspective of Disappearance Index
  Previous  Next 
Buy this Book at Amazon.com

The Da Vinci Notebooks at sacred-texts.com

235.

The importance of light and shade in the perspective of disappearance (235-239).An opaque body seen in a line in which the light falls will reveal no prominences to the eye. For instance, let a be the solid body and c the light; c m and c n will be the lines of incidence of the light, that is to say the lines which transmit the light to the object a. The eye being at the point b, I say

p. 132

that since the light c falls on the whole part m n the portions in relief on that side will all be illuminated. Hence the eye placed at c cannot see any light and shade and, not seeing it, every portion will appear of the same tone, therefore the relief in the prominent or rounded parts will not be visible.


Next: 236.