I work with 3D scans and I find that I have a lot of spikes and tunnels that need to be smoothed before retopo happens. Is there a brush or a way to remove these quickly? Most surfaces are organic but I do happen to have spikes on flat surfaces.
Thanks
You could try the Smooth Peaks and Smooth Valleys brushes respectively in problem areas. The retopo process itself should remove a lot of deformities depending on how you’re doing it. Remeshing and projecting or running it through dynamesh may also remove a lot of defects (or it may make them worse, depending on the situation).
What are your source scans coming from? Some 3D scanning packages will run some noise and other cleanup processing before exporting to use in other software packages like Zbrush.
Can you also provide a screenshot of the full model?
I have tried those brushes it works in general but the peaks that are one vertex peaks do not move. Its almost like its stuck. I ended up taking the mesh into 3DsMax and deleting the vertex and re importing to finish the job.
In this case its from Agisoft Photoscan. This one has a few options but It’s a common problem and I find the scanning software is more general cleanup rather than small problem areas.
Sure here is a pic of before:
You can see the final result here: http://www.thingiverse.com/thing:172209
Well, you could simply lasso-hide the problem spikes, delete them ( Tool> Geometry> Modify Topology> Delete Hidden), then close the holes (geoemtry> Modify Topology> Close Holes). You’re resurfacing anyway, so the ugly geometry shouldnt make a difference.
On a spot by spot basis, you might get some mileage out of subtle application of the planar brush to force flatten the peaks. At the very least this might help you isolate the exact polys that need deleting.
If you want to roll the dice a bit, you could also just run it through a high resolution dynamesh, or Zremesh and project detail onto the subdivided re-mesh. It may eleminate many of these defects, or at least turn them into more manageable geoemtry that is more responsive to smoothing. In the cases of extreme spikes it runs the risk of creating unwelded polygons that will in turn create artifacts or holes in any subsequent remeshings. But you can usually spot these from their side effects, and track them down.
Thanks Spyndel I think deleting and closing holes might be the best way. I was hoping that a regular smooth brush would work but I guess I would need to use a planar brush first before smoothing.
Are these your scans or someone else’s?
The scans I generated from photos that were supplied to me. I did not take the photos. If you want more detail about that scan you can follow the thread here: http://www.reddit.com/r/3DScanning/comments/1p3oc9/comparison_of_visualsfm_and_123d_catch/cd063in
Bonus link here is the model files: http://www.thingiverse.com/thing:172209