NURBS  Modelling Audi A5 Rear Apron

Make sure that you have perfect curve combs in the Top view.

Here my students lower crv is perfect whilst the top crv has an inflection.

Wobble in the highlight

Built with the Square tool

She later detached the surface

Just deg. 3

Amazingly a 3 deg sq. surf has the flexibility to build around the sweeping curve of the apron. You can see that she needed 8 spans to get G1

Zebra Stripes

Remember to check every surface with the Zebra tool. Here we can see that the surface is smooth internally, but the highlights a meandering. This only partial due to the inflexion. Probably an extra crv at the corner would have helped, but this would have been  much harder to model

This surface is fine

at the Styling stage, as it’s underneath the vehicle, but for major surfs, such a highlight problem would have to be corrected

Finished job Impressive

Her detailing made the finished model look really impressive.

So to sum up

• Perfect crvs to start with
• Try to make sure that the 2 end crvs have a similar character
• You can build it with just 1 deg 3,3,8,1 square surf
• Consider using this as a transitional surf and then detaching it to create several smaller single span surfs. (for a lighter model)
• Evaluate your surfs with the Zebra

Cheers,

graham

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Hi,

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Kind Regards

graham bullock B.Ed. Des & Tech.