Hi everyone. I seem to have a problem in understanding how light falls on objects, faces, etc.From right or left only or also from front right and front left. I will attach two drawings. In the one with with the apple light comes from front left. In the one wth the russian doll light comes from front right. Did I do it correctly?

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I also have a shading problem. I need to learn how to shade properly.But more important is learning how light falls. Please help.

Try out some of the lessons here on DS they are very good
http://www.drawspace.com/lessons/section.php?id=g

These images have the shading more or less in the right place according to your light source, but your darks are missing. You've got light and midtones but no real darks to indicate shadow.

Elena, are you working from your imagination or from real life or photos?

From a reference or life, shading is pretty straightforward. It is what you see in front of you. If you're trying to draw from your imagination, then you have to decide where the light source is coming from and make your shadows on the opposite side of your subject.

There will also be reflected light and subtle changes in tones that go along with it.

To help lean how light reflect, stop by your local Dollar store and pick up a couple LED Clip on lignts. These are not the greatest but for $1 they work fine.
Set up your doll on a white or light colored table or cloth. Find something you can stand next to the table or set on the table that you light can clip on. Turn off all the lights (at night) in the room and observe the way the light falls on the doll. Move the light around the doll to see what happens to the sadows. Move it closer and farther away to see the different changes. You may want to turn on some dim lighing and try to do the drawing, or if you have a tripod you can actually take photos of the doll without using a flash, so you can work in a lighted room at another time.

This is how I took this photo, for I can not imagine how it would look without seeing it.
Sphere

Thank you guys I guess i need to approach this issue with patience and dedicate real time to study all the angles. The doll was from life at night with a lamp buy in daylight the window is also positioned front right.