Art for Practice 1

So throughout this year of uni I have learnt many techniques and skill that have improved my art. However, I have only recently started practising these on my own. I was so busy focusing on the other aspects of the course and the set projects for this section that I have not found time or motivation to practice concept art.
So I have finally got round to practising some techniques and my art skills in general. Here are a few of the pieces I have done to practice.

This robot was to practice lighting and try out rim lighting which I have never done before.

I made this robot dinosaur because I wanted to practice form and character concepts.

This one was for me to play around with dramatic lighting and try making some fire particles. I also ended up practising posing with the character in the piece.

This one was for me to practice making rocks. I am happy with the grey rock but not the mossy one. I think it is too blurry and soft to be moss/lichen on a rock.