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adding holes to the hippo

Hello Professor,

Attached are a few images of my in-progress hippo attempt. I feel that a majority of the shaping is good, but I cannot figure out how to add the holes into the back without destroying the normal geometry. Is this a case of moving the object into Rhino and doing some trimming then thickening, or is there a way to do it in T-Spline?

Thank you,

Jordan Rivera

Jordan,

Your model looks great! It looks like you’ve been working very hard on the exercise. I suggest adding the holes in T-Splines.  I created an example below that illustrates the basic strategy for doing so…

Capture1

To get started with this example, I created a quad ball and then subdivided it.

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Then I started aligning the edges to the desired location of the big hole.

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And did this for the small holes as well.

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And then I selected all the faces I wanted to delete.

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And as you can see, the model went crazy when I did the faces, because in T-Splines what you do to one edge will have an effect three edges out, so the hole interfered with the smoothness of the neighboring faces.

Capture13

Next I adjusted the points to get them basically where I thought they needed to be, ignoring the semi jagged nature of the geometry.

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Then I selected the edges of the holes and extruded them down a couple of times.  Doing this makes it possible for the faces surrounding the holes to smooth out.  You could achieve the same result by thickening at this point; however, there’s still a lot of refining to do to the outer form, and if you thicken now you’ll need to adjust both the inside and outside points at once in order to preserve a consistent wall thickness. So it’s better to just use temporary extruded edges to make the model smooth while you continue to refine it.

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Next, I worked on adjusting the points to create a better looking, more even surface.

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It’s helpful to toggle to box mode so that you can be sure the underlying geometry is consistent and regular.

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When you’re totally finished refining your model you’ll want to select those edges you extruded inward earlier and delete them.

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Again, your model will go crazy, but this is temporary.

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Once you use the thicken command your model will smooth back out.  If, while running the thicken command you get a strange result, then try selecting smooth edges rather than creased edges in the command line.

This example isn’t perfect.  If I were doing this for my own artwork I would refine the topology much more to get a smoother result, but this quick example at least illustrates the basic strategy for adding holes to a model.

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