الإضاءة اللازمة لإظهار ملمس السطح Surface Texture .. كتاب الإضاءة والفلم

Lighting needed to show the surface texture:

The texture of the surface of objects differs, for the texture of velor is different from that of silk, and it differs from the texture of leather or the texture of a glass cup...etc.

A successful photograph is not the one that achieves showing the shape of bodies only and showing the relative relationships between the measurements of the parts of these bodies, but it must also be faithful in showing the texture of the surface of bodies. Chinese luster, or depict a bag of velveteen as if made of damur cloth or silk.

The best way to show the texture of the surface is to light the objects according to the following:

(a) That the main illumination be from a source of focused light emitting oblique light rays falling at an acute angle, i.e. almost parallel to the level of the surface to be photographed, and it is obvious that this illumination works to materialize any surface irregularities in the surface to be photographed, (similar to We have previously told him about one of the methods of photocopying documents (Fig. 97, page 307).

(b) Diffused auxiliary lighting should be used to fill in the shadows, and the light energy emitted from this last source is significantly less than that emitted by the main source. This last illumination works to show the smoothness of the surface of the body, and unless we do that, it will certainly appear roughness in the form of contact with the surface of the body due to the extreme contrast that results from the sharp lighting emitted by the concentrated light sources in their position mentioned in item (a). . And in my figures 105 and 106 there is an explanation of what we say.

How to distribute lighting to show the surface texture

(A) A concentrated light source that works as a main light for the right shoe and has been placed slightly above the front so that the rays fall obliquely to show the visible dates.
in the sole of the shoe.

(B) Another source of focused light was made upper and slightly posterior so that the rays fall on the mouth of the left shoe (made of fur).

(C) A third source of concentrated light placed in a hidden place in relation to the left shoe and to the side in relation to the position of the camera.

(d) A source of distributed light from a searchlight that emits broad illumination that works to fill in the clouds resulting from concentrated light sources, and to transfer the amount of light emitted by this source from that emitted by other sources.

Lighting needed to show the Surface Texture:

(a) A source of focused light placed at the top in front of it so that its rays fall at an acute angle on the surface of the body to be photographed. In addition to concentrating the rays emitted from it, a cylindrical tube (known as Snoot) was placed in front of it to control the smallness of the light spot.

(B) A focused light source placed in a posterior position relative to the bag to be photographed, to show the upper roundness in reality and separate it from the back of the photograph. .

(c) A searchlight that emits broad, distributed illumination to fill in the shadows.