Hi Marieridge,

It's Greg here.

Superimposed lines - they are done good. Starting ends of lines don't fray as you controlled beginning position of a pen. The longer lines the more they fray at the stopping ends and subsequent lines more deviate to sides what is normal. As I can see subsequent lines don't deviate in wavy manner but rather to one side so this means you are doing them confidently. Some lines, shorter ones, are nicely done it is matter of practice to achive this in longer. Curved lines are tricky but you control starting end.

Ghosting lines - they are smooth and they are quite accurately - they start and stop at or very close to dots. They are also rather confidently drawn it means bowed to one side only. There are some with slight wavynes. You could draw not trying to hit final dot but rather having confident straight line as a priority. But you are on right rack.

Ghosted planes - done well, some dividing lines are more bowed then in ghosting lines part. You could put dots in places where ends of dividing lines should be - this will help you to be more confident in drawing them.

Table of ellipses - you are drawing ellipses precisely, they touch both lines and side of other ellipse. Also you are drawing them through required two or three times. They are rather tight but also wobbly, maybe you should try to draw them less accurate but faster and more loosly to improve line confidence, smoothnes at this stage.

Ellipses in planes - this part is harder then the tables. In this part some ellipses are wobbly as you try hard to hit lines. This is tough to do as there is more points to control. Keep in mind that line confidence/smoothnes is the top priority here. Although tis is not main goal here the way you are putting ellipses in planes looks good.

Funnels - You are precise but you sacrificed smoothnes of ellipses shape and smoothnes of ellipses lines because of concentration on that accuracy. Try to be more loose, relaxed. During warm-up you could try draw ellipses closing eyes after after ghosting. This can be also tried with superimposing and ghosting exercises.

Plotted perspective - done correctly, nothing more to say here.

Rough perspective - well done, only you missed how to draw check lines (red ones on your drawings). You should draw them not to preset vanishing point but draw them through corners to a horizon line. You should correct this on existing drawings by drawing such lines with other color then red - this will show you your strong points and places prone to errors.

Rotated boxes - your attempt here gives impression some 3d object. You lost your line confidence here as it is normal being concentrated on such task. Front (external) sides are drawn good, you chosen points of next tiles close to existing tiles and using them as guide. You have some troubles with internal (close to center) sides of boxes. You could treat them as external ones and use existing as guide.

Organic perspective - good done. It seems that you lost your confidence at first boxes but you recovered from this. Your boxes diminish as they go further and you weren't afraid to overlap them what gives good impression of space.

So, I think you done well this exercise, and you can go to 250 box challange.

Also as you be doing warm-ups remember that smoothnes/confidence of lines are most important here before accuracy.

Good luck,