Box Drawing and Perspective

Today's task was to capture The model lying in certain angle so that the correct perspective and curves of the body would be captured. Previous lessons as well as homework aimed to show me how body works when used 3D boxes to block out the curvature of the body as well as form and shape.

Personally I think I did it very well, the model was very understanding pationt and remained still. I spent roughly 5 minutes per box shaped bodies and 15-20 minutes on detailed sketches.

The above one is lesson sketches of the model, the Image below is my spare time practice sketches.

And moving on to some detailed 15-20 minutes one.

I have noticed my mistake with 4th drawing - crouching posture. I haven't done my measurements correctly and as result the back of the model look bigger to the scale of the head. also the leg should be bigger as well

Quick sketches done during lesson. My measurement looks like a dissaster therefore nothing looks correct :/ I need more practice. As for the Lady right Below. I looked up at different artists on the website that do human anatomy drawings. And I found useful ways of measuring. such as drawing the chest in skeletal form and the pelvis. However the pelvis delicate lines are not visible on it as the chest is.