Hi, I think you did pretty well, but I do have some notes that I think would be of use to you.

I will structure this critique by looking at your wheels row-by-row.

  • 1-5

    • Pretty decent perspective all around- your wheels and their parts go well together

    • Texture spacing doesn't change as it should too often- they should appear to better wrap around their base (see the evenly spaced lines in wheel 2)

    • (I may be wrong as I don't have your references, but) Textures sometimes don't align with their base form well, going against its contours (see the lines in tire 3, how a lot of them flow downward, seemingly against the tire. Rather than being slanted by nature, they appear to simply contradict the tire's form. Please ask for clarification if this doesn't make sense!)

  • 6-10

    • Wheel perspective = a little too dramatic for the type of perspective you drew. If you were to imagine the wheels as cylinders, some of the backs of the cylinders widen in degrees really quickly, going against some of your texture work (see wheel 7; how the curves at the back curve more dramatically than the curves acting as the textures of the tires)

  • 11-16

    • Good perspective on details- the small touches of thicker lines go a long way to enforcing the wheel's 3-D nature.

    • Got kind of lost with the wheel forms- wheel #11 is the sort-of 'ideal' form you should be aiming for

  • 17-22

    • Consider continuing textures beyond a form's silhouette. For example, some of the bumps on the wheels' treads should

still be seen affecting the wheel's silhouette on the upper or lower sides of the wheel. It's a small detail, but again, it goes

a long way.

  • 23-25

    • Got a little lost on the textures on #25. The slants should be appearing to get more flat the further up the tire you go, not

more slanted.

All-in-all, I can tell that you've been learning a lot through doing these exercises. Your ability to convincingly create smaller-scale forms and textures is good, and has improved through the duration of the challenge.

I think one thing to think about is that, no matter if a texture may appear more 3 or 2-dimensional, it still rests on a base, so it must conform to said base. Like I touched on in my previously mentioned example for wheel #25, textures get warped in perspective as much as forms do, so it's important to give them a good level of thought alongside the forms you create. I will mark this challenge as complete, as I feel as if you understand how to well create convincing forms and textures, especially when dealing with rounded surfaces.