Translations:Tutorial FreeCAD POV ray/50/en

If the light source is supposed to be in the scene, it may be useful to see a reference on the screen where this source should be. To this effect, create a sphere of a small radius and assume this sphere represents the light source; position the sphere where you want, then move the light very close to these coordinates, and test the lighting of the scene; when you are satisfied with the position of the light, simply delete the sphere.