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Optimizing geometry
I'm trying to import models from Revit Architecture into Unity3D, but the FBX files imported are not very optimized geomtry
(see this sample: http://farm5.static.flickr.com/4123/4804822886_e8277c1170_b.jpg )
Does anyone know any tips or techniques for reducing the imported model down to a more useful geometry for Unity? I've also been trying to optimize it in Maya, but haven't been able to find a command option that successfully reduces the model without crunching into a useless form.
Thanks in advance for any advice!
Answer by Novodantis 1 · Jul 18, 2010 at 03:07 PM
If you mean the selected wireframe in the image, it looks fairly optimised; certainly enough for it not to impact performance. I wouldn't worry about it, unless there is anything specific that's concerning you?
edit: in regards to optimising geometry, I would always recommend using your 3d modelling program rather than Unity.
I agree, the wireframe looks as optimised as it can be. You can't reduce down the top and bottom sections to say each being a single quad as that would create T junctions above the windows. $$anonymous$$ind you I've always considered long thin triangles to be poor. I believe there used to be various penalties, performance/visual, though not sure if it applies these days. However to get rid of those you'd have to add more vertices.
Answer by Julian-Glenn · Jul 19, 2010 at 12:33 AM
This mesh looks typical of a 'Boolean" operation victim. While the triangle count isn't outrageous you would get a cleaner model using a shell modifier and maintaining quads rather than a Boolean which results in those ugly triangles.
Here is a great tutorial on using the shell modifier to create architecture very similar to yours.
:)
Answer by h0stis · Jul 19, 2010 at 08:28 AM
I'd do something like this: And, yes, there are a lot of ways to retopologize your model. Try to search "retopology in /your 3d package of choise/". As far as I know there good tools for this in 3ds max, maya, zbrash. There is even a programm which is created solely for this purpose - to retopologize, the programm is called Topogun.
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