Hello kostiskok, I'm ThatOneMushroomGuy and I'll be the TA handling your critique today.

Arrows

Starting with your arrows your lines are looking fairly confident and smooth, which helps communicate a nice sense of fluidity in your arrows as they move through the world. You're keeping foreshortening in mind while constructing your arrows which allows you to make really good use of perspective and the depth of your page, this gives a nice extra layer of tridimensionality to your arrows.

Your usage of hatching helps you establish how your arrows twist and turn in space and further your own understanding of the tridimensional space these objects occupy, it's good that you're making use of added line weight on top of the overlaps in order to reinforce their depth.

Generally you're doing a good job with this exercise, I'd like to encourage you to get out of your comfort zone more often the next time you tackle this exercise in order to keep pushing yourself. Try arrows with different kinds of twists and turns and different rates of foreshortening, keep in mind that arrows are very flexible objects and can move freely across the world in all sorts of manners, so you should push yourself and explore the different possibilities.

Leaves

The linework for your leaves is looking smooth which helps communicate their fluidity and sense of energy, but something to note is that the majority of your leaf structures don't fold or bend in any way, this is something to keep an eye on whenever you tackle this exercise again, as leaves are organic structures that are affected by all sorts of forces, from the wind to gravity to their own weight pulling them down. As you construct real plant structures you'll find that leaves will actually be oriented in a variety of different ways, and you'll improve much more by thinking about the way these objects look when they move through the world from moment to moment, instead of just trying to capture how they sit statically within it.

Your addition of edge detail is generally looking good, as you don't usually attempt to capture more than one piece of edge detail at a time, and you generally construct your edge detail additively. You're also keeping the line thickness between your phases of construction roughly consistent, all of which is very good and helps you create a tighter, more solid construction that still feels fluid and energetic.

Branches

Moving on to your branches they are coming along really decently made as you're following the instructions for the exercise, you're drawing your edges in segments which allows you to maintain higher control over your marks and helps you create solid but still organic looking structures.

There are still some visible tails present in these branch structures, while this is a very common mistake we can attempt to mitigate it by limiting the amount of ellipses in our branches, by spacing them further apart we'll allow for a bigger length of runway between ellipses, and ensure a smoother, more seamless transition between marks.

For ellipses it's good to see that you're making an attempt to always draw through them twice, as that allows for a smoother mark overall. When it comes to your application of the ellipse degree shift it's good to see that you're aware it exists, but your addition of it can still be improved, as it stands your degrees are too consistent and hardly change which is a mistake that flattens your structures. Remember that as a form shifts in relation to the viewer, so will the degree of the ellipses within that structure also shift.

Plant Construction Section

And lastly let's take a look at your plant constructions, which are coming along quite nicely made. You're generally making use of the construction methods and techniques introduced in this Lesson which helps you create the illusion of tridimensionality in your work, you're not only trying to capture what these structures look like, but you also focus on how they work, how they exist fully in tridimensional space by drawing through your forms and thinking about the way each piece of your construction exists in relation to one another.

This is all very good and it's helping you develop a strong sense of spatial reasoning, there are only a couple of small things that if kept in mind will help you take your work to the next level.

When working on your constructions make sure to keep the relationships between the different stages of construction tight and specific, don't leave any spaces in between a leaf's flow line and it's outer edges such as in here, and when you draw forked branches or knots make use of the correct method in order to make your construction clear and specific.

You're not usually making use of edge detail in your pages, edge detail would have greatly helped you further communicate the form of your structures and how they move through space, but by not adding it they're left very simple, so make sure to add edge detail whenever possible, and remember that only the last step of leaf construction - texture - is optional.

In the instances where you have made use of edge detail do not forget to add your edge detail additively, on top of your forms, whenever possible, as cutting back into the forms you've already drawn will make you focus too much on manipulating 2d shapes on a page, rather than the tridimensional edges they represent in 3d space.

Another issue is one that can be addressed quite easily, when you put contour lines on your forms they don't really communicate any new information to the viewer. Those kinds of contour lines, the ones that sit on the surface of a single form, only serve to take a form that can already be interpreted as 3 dimensional, and clarify it. In truth, they're useful for introducing the concept of a contour line, but in practice their usefulness is somewhat limited and it can be overused, such as in petal structures or certain vase structures, it can also end up becoming counterintuitive to the form you wish to communicate since if even one contour is incorrect it will throw off the volume of the entire piece.

As such it's strongly recommended that you don't add these types of contour lines to your homework, instead, focus on contour lines that communicate the intersections between forms.

Final Thoughts

In general you are doing well, I believe that in these pages you have demonstrated that you do understand the way these construction methods and techniques should be used and why they're important for your work even if it can be improved upon, as such I'm going to be marking this submission as complete. Good luck in Lesson 4.