Hey knightdroid! I like the exercise. For the first image: First thing I would immediately point out is that the cylinder representing the upper arm/brachium is not being foreshortened. The lines stay parallel for first 4 transformations. You should angle them like you did in the 5th transformation, just in smaller steps. In other words, they should be begin angling towards a vanishing point once you rotate them away from their perpendicular angle to the viewer. The cylinder/cone representing the forearm has a square at the end of it that isn't quite keeping its shape, or representing itself accurately to how it should once it gets angled towards the viewer. The first tip I would recommend to help you visualize this is to contain all of the circles within a square, as the transformations being applied to the square will shrink and angle the circles at each end of the cylinders. For the second image: The 5th transformation should not have a flat square if it isn't facing directly towards the viewer. I think you do a good job respecting the fact that the surface lines of the forearm would curve more as they approach the viewer, just make sure to stay consistent on how many lines there are, you miss some as you transform the image. And in general: I would recommend learning more of perspective, and assuming you are in the process of that, incorporate more of the concepts into your exercises. Vanishing points, horizon lines, X,Y,Z axis; these are all things you can add into your exercises to not only learn the concepts themselves but also how they affect the shapes you draw (even if they aren't there in the drawing.) Otherwise, keep it up. Good work from one droid to another (My username is 0mnidroid but that isn't showing for some reason :| ).