Hello everyone. This is my first post here on the forum. I saw this challenge and decided to give it a shot. I think it's a really good challenge that seems simple but in reality can be a bit difficult to accomplish. I think I came up with a really good way to do it that is simple and quick. Hope you all like it. After a few attempts, I realized that the curve around the ball has a certain symmetry to it and can be divided into 8 equal parts. My process is based on that idea. Here we go!
First I made a sphere, and erased all but 1/8 of it. I made that section into a component. I then copied and flipped that component to reassemble the sphere. Next, I rotated 1/2 of the sphere 90 degrees.
[image: 9yzR_TennisBallBuild1.jpg]
I then opened one of the components and drew the curved line freehand on the surface. I began at the point marked with the red dot. This point is the center point of this arc.
[image: HdW9_TennisBallBuild2.jpg]
After tweaking the line by eye to make sure it flowed smoothly around the ball, I offset the line twice on each side. I attempted to use the "offset on surface" plugin, but it produced unfavorable results, so again I did this freehand.
[image: XFyn_TennisBallBuild3.jpg]
At this point, I exploded all of the components and smoothed the lines where they connected.
[image: r4Ye_TennisBallBuild4.jpg]
After scaling the recessed white line a bit to add some dimension, I continued to add materials and soften all remaining edges.
[image: IQ6M_TennisBallBuild8.jpg]
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