Wavy, distorted normals

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Old 04 April 2013   #1
Wavy, distorted normals


I'm have a problem, a rather major one: When trying to bake normal maps off of circular objects, the normals come out wavy, as this article describes: http://www.chrisalbeluhn.com/Normal_Map_Tutorial.html
The relevant part is about halfway through the article.

Either way, I've tried to do what he says, editing my cage mesh so that, I hoped, the projection around the side would be horizontal. But it doesn't. It seems like the cage is largely ineffectual in Maya. So, does anyone have any idea of how to sort this out?
Old 04 April 2013   #2
The cage in maya actually doesn't do what is expected. When you try to do per vertex changes to the mesh they won't work as intended. Usually you can make a cage mesh on your own in maya and then do the bake in something like xNormal so that you can make use of the cage function. Or work with your UVs to remove the issue.
Andres Weber | CG Generalist
434 Broadway, 9th Floor, New York City, 10013
GChat AndresMWeber
Old 04 April 2013   #3
How do I include a custom cage mesh in xNormal? Not overly familiar with that application, apart from the most basic baking tools.
Old 04 April 2013   #4
Nvm, I found how to include my custom cage.
Now, for the next problem: My imported lowpoly meshes normals doesn't seem to import (or be interpreted) correctly. My object is an 8-sided hamburger for a mobile game prop. When baking the map, I get very sharp lines going vertically in the normal map, even though all my normals are smoothed on the object I exported. Has it got something to do with using .obj to export the mesh? I've experienced .obj files being imported fully faceted before, even though they weren't faceted in the application I exported them out of.
Old 04 April 2013   #5
I would need to see a picture of the issue to do some triage.
Andres Weber | CG Generalist
434 Broadway, 9th Floor, New York City, 10013
GChat AndresMWeber
Old 04 April 2013   #6
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