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<strong>Step 9:</strong> Now, you are encouraged to use your creativity to tweak the side profile of the egg to your own taste. I'll give a couple suggestions for how to tweak the spline for best results, but you are welcome to change the lengths of any of the construction lines to get different results. When you have the spline selected, you will see "adjustment arrows with diamonds" that are tangent to the spline. They can be manipulated to change the shape of the curve. You always can press ctrl-Z to undo a change and revert back to the spline's previous shape.
<strong>Step 9:</strong> Now, you are encouraged to use your creativity to tweak the side profile of the egg to your own taste. I'll give a couple suggestions for how to tweak the spline for best results, but you are welcome to change the lengths of any of the construction lines to get different results. When you have the spline selected, you will see "adjustment arrows with diamonds" that are tangent to the spline. They can be manipulated to change the shape of the curve. Click and drag the diamond to change the angle; click and drag the arrowhead to change the length; click and drag the point at the tip of the arrowhead to simultaneously change both the angle and the length. You always can press ctrl-Z to undo a change and revert back to the spline's previous shape.
If you zoom into the top of the egg, you'll notice that the spline connects to the 1mm horizontal line at an angle (see the first screenshot). We would like the spline to be approximately horizontal at the point of connection with the 1mm line. This will give the appearance of a nice continuous curve, but it doesn't need to be exact. To do that, pull the Smart Dimension of the 3mm line over to the right side to give yourself a reference. Then move the adjustment arrow thing from the spine parallel with the Smart Dimension reference line (see the second screenshot).
If you zoom into the top of the egg, you'll notice that the spline connects to the 1mm horizontal line at an angle (see the first screenshot). We would like the spline to be approximately horizontal at the point of connection with the 1mm line. This will give the appearance of a nice continuous curve, but it doesn't need to be exact. To do that, pull the Smart Dimension of the 3mm line over to the right side to give yourself a reference. Then move the adjustment arrow thing from the spine parallel with the Smart Dimension reference line (see the second screenshot).
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<strong>Step 9:</strong> Zoom into the bottom of the egg and perform the same operation on the intersection between the spline and the 6mm line. Again, the goal is to make the spline approximately horizontal where it connects with the 6mm line to maintain the continuity of the curve.
<strong>Step 10:</strong> Zoom into the bottom of the egg and perform the same operation on the intersection between the spline and the 6mm line. Again, the goal is to make the spline approximately horizontal where it connects with the 6mm line to maintain the continuity of the curve. As you manipulate the spline, you might like to click on the Show Curvature checkbox in the left column to see a visual representation of the intensity of the spline's curve at each point. Change the curvature scale and density to taste.
[[File:Egg 10.png|1500px|none]]
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<strong>Step 11:</strong> One you are happy with the shape of your spline, you can deselect Show Curvature. Select the spline and click on Offset Entities. Set the distance to 3mm; this is defining the wall thickness of your egg. Make sure the new offset curve is on the inside of your spline. Toggle the Reverse checkbox to switch the offset curve between inside and outside.
[[File:Egg 11.png|1500px|none]]
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<strong>Step 12:</strong> One
Smart Dimension the line to 45 degrees from the vertical construction line.
Smart Dimension the line to 45 degrees from the vertical construction line.