Tress by a lake. Done in pencil.
C&C please! 
I was just looking at some of these, and I was thinking to myself, i think you might like a charcoal drawing technique I learned in college,…
You start out by taking a stick of compressed charcoal, and using a knife to scrape of bits of charcoal powder onto the surface of your paper.
Then you use a piece of leather shamois, or your fingers to rub it into the surface a bit, so you end up with a nice even gray.
Now you take one of those pliable gray erasers, and rough out your drawing using the eraser to map in the light areas. You then repeat this process a couple of times, getting a little more controlled each time, and when you are done with That, you start working in your shadows using the compressed charcoal, and one of those compressed paper blending sticks.
Now you take a piece of vine charcoal ( vine charcoal stays mostly on the surface of the paper, and can be easily brushed away ) and sketch in where you want your details to go. Having done that, take a charcoal pencil ( regular old charcoal pencil. the kind that have the little string, and the rings of paper that you peel away to ‘sharpen’ it. ) and start drawing in the details. Be sure to keep a piece of paper in between your hand and the drawing paper, so you don’t smear it, and use a piece of sandpaper to sharpen the tip of your charcoal pencil. Now you will want an eraser that you can get some more fine control with when doing the details, so get one of those ones that are like a mechanical pencil, and use an exacto knife or a razor blade to chop off the tip when it becomes to rounded. You want this one to have a sharp edge, so you can erase in some nice details. Also, when you are doing the details, and actually throughout most of the process, you are going to want to use your blending stick alot, unless you are going for that grainy charcoal look,…but if you want a nice smooth result, use the blending stick…Anyway, that is more or less the method I learned. I hope it is of use to you.
Good trunks! But the shadow of the tree at the background should be painted with the less angle - I mean the back shadow area should be shorter and to the right while the front longer and to the left. Can somebody translate what I mean 
?
Good trunks! But the shadow of the tree at the background should be painted with the less angle - I mean the back shadow area should be shorter and to the right while the front longer and to the left. Can somebody translate what I mean ?
I think what you mean is that the way the reflection is cast is unnatural.
Can I point out that the two reflections are just unnatural, as is? Is that the lake that in front of the line? There’s an inconsistency of shadows here. If we can see hints of the trunk reflected on the water’s surface, then that other, more obviously tree-like reflection shouldn’t be there at all.
I cut out this section from a colored pencil drawing I did a few years ago (the rest of the drawing has no relevance to it.) Sorry it’s so small, but here’s what I’m talking about:
Notice how the mountains cast shadows into the water vertically, and nothing else? It’s consistent and natural. However, if lemmy wanted to do one of those scenes where the lighting casts two shadows… inconsistency would still be a problem, but I guess two shadows wouldn’t be so odd.
No no no…The vertical ones are reflections, and the horizontal ones are shadows.