[REQUEST] Smooth feature for VDB Remesher #72774

New Issue

paul geraskin · 2019-12-29T19:20:02+01:00

paul geraskin commented

2019-12-29 19:20:02 +01:00

Blender Version
Blender 2.81a

Short description of error
Hello super devs. I would like to ask you a smooth feature for the VDB Remesher. I use it in ZBrush and Houdini.

Here how it looks like in Blender. There is no feature to smooth VDB.
Here is my Blender file. tmp1.blend

Here it is in ZBrush:

Here it is in Houdini. There is VDB Smooth node. It smooth voxels and mesh becomes pretty good. I guess this is OpenVDB part.
Here is Houdini file. vdb_test_1.hipnc

Thanks. I hope it's possible to add. I guess this is a couple of strokes in the VDB Remesher code.

**Blender Version** Blender 2.81a **Short description of error** Hello super devs. I would like to ask you a smooth feature for the VDB Remesher. I use it in ZBrush and Houdini. Here how it looks like in Blender. There is no feature to smooth VDB. Here is my Blender file. [tmp1.blend](https://archive.blender.org/developer/F8250617/tmp1.blend) ![tmp3.png](https://archive.blender.org/developer/F8250607/tmp3.png) Here it is in ZBrush: ![tmp4.png](https://archive.blender.org/developer/F8250604/tmp4.png) Here it is in Houdini. There is VDB Smooth node. It smooth voxels and mesh becomes pretty good. I guess this is OpenVDB part. Here is Houdini file. [vdb_test_1.hipnc](https://archive.blender.org/developer/F8250615/vdb_test_1.hipnc) ![tmp1.png](https://archive.blender.org/developer/F8250611/tmp1.png) ![tmp2.png](https://archive.blender.org/developer/F8250613/tmp2.png) Thanks. I hope it's possible to add. I guess this is a couple of strokes in the VDB Remesher code.

paul geraskin commented

2019-12-29 19:20:02 +01:00

Added subscriber: @PaulGeraskin

Regnas commented

2019-12-29 20:00:26 +01:00

Added subscriber: @Regnas

Regnas commented

2019-12-29 20:00:26 +01:00

This site is not request friendly. hehehe
But how about smooth it after the remesh?
2019-12-29_19-53-53.mp4

This site is not request friendly. hehehe But how about smooth it after the remesh? [2019-12-29_19-53-53.mp4](https://archive.blender.org/developer/F8250664/2019-12-29_19-53-53.mp4)

Ray molenkamp commented

2019-12-29 20:10:43 +01:00

Added subscriber: @LazyDodo

Ray molenkamp commented

2019-12-29 20:10:43 +01:00

Changed status from 'Needs Triage' to: 'Archived'

Ray molenkamp closed this issue

2019-12-29 20:10:43 +01:00

Ray molenkamp self-assigned this 2019-12-29 20:10:43 +01:00

Ray molenkamp commented

2019-12-29 20:10:43 +01:00

Thanks for the report, but please use other channels for user feedback and feature requests: https://wiki.blender.org/wiki/Communication/Contact#User_Feedback_and_Requests

For more information on why this isn't considered a bug, visit: https://wiki.blender.org/wiki/Reference/Not_a_bug

Thanks for the report, but please use other channels for user feedback and feature requests: https://wiki.blender.org/wiki/Communication/Contact#User_Feedback_and_Requests For more information on why this isn't considered a bug, visit: https://wiki.blender.org/wiki/Reference/Not_a_bug

paul geraskin commented

2019-12-29 21:59:19 +01:00

Added subscriber: @PabloDobarro

paul geraskin commented

2019-12-29 21:59:19 +01:00

Thanks for answering.
@Regnas , Mesh Filter is good but it smoothes polygons (not voxels). And because of it there become artifacts. As you can see on your video.

In houdini it's possible to smooth vdb voxels. And it makes good result almost without artifacts with one click.

@LazyDodo Thanks. But about 2 years ago i did Feature Requests here and it was ok. I guess some things were changed.

@PabloDobarro Sorry, did you implemented the vdb remesher? Is it possible to add VDB Smooth?

BTW, This addon has VDB Smooth. https://blenderartists.org/t/openvdb-remesh/1102023

I guess this is pretty simple to implement in blender.

Thanks for answering. @Regnas , Mesh Filter is good but it smoothes polygons (not voxels). And because of it there become artifacts. As you can see on your video. ![image.png](https://archive.blender.org/developer/F8250878/image.png) In houdini it's possible to smooth vdb voxels. And it makes good result almost without artifacts with one click. ![tmp2.png](https://archive.blender.org/developer/F8250613/tmp2.png) @LazyDodo Thanks. But about 2 years ago i did Feature Requests here and it was ok. I guess some things were changed. @PabloDobarro Sorry, did you implemented the vdb remesher? Is it possible to add VDB Smooth? BTW, This addon has VDB Smooth. https://blenderartists.org/t/openvdb-remesh/1102023 ![image.png](https://archive.blender.org/developer/F8250891/image.png) I guess this is pretty simple to implement in blender.

Regnas commented

2019-12-29 22:40:12 +01:00

In #72774#839708, @PaulGeraskin wrote:
Thanks for answering.
@Regnas , Mesh Filter is good but it smoothes polygons (not voxels). And because of it there become artifacts. As you can see on your video.

Yeah, that was a nasty hack lol. Proper vdb smooth would be nice to have.

> In #72774#839708, @PaulGeraskin wrote: > Thanks for answering. > @Regnas , Mesh Filter is good but it smoothes polygons (not voxels). And because of it there become artifacts. As you can see on your video. Yeah, that was a nasty hack lol. Proper vdb smooth would be nice to have.

Pablo Dobarro commented

2019-12-30 01:02:14 +01:00

OpenVDB filters and CSG operations are already implemented, there are just not exposed in the current voxel remesher. You can enable them with a patch as simple as this P1197 (just an example of the gaussian smooth filter)
The thing is, I don't want to add all the OpenVDB options and filters to the current voxel remesher, which was only designed with sculpting in mind. All that code is there to support the voxel remesh modifier, which is in review. That modifier should have all the options available in a more complex UI and it should be the intended way to use OpenVDB remeshing for things like hard surface booleans or simulation proxies. But if you find a particular filter (or combination of filters) that can be useful for sculpting and they just need a single parameter to control it we can add it to the current sculpt oriented voxel remesher.

OpenVDB filters and CSG operations are already implemented, there are just not exposed in the current voxel remesher. You can enable them with a patch as simple as this [P1197](https://archive.blender.org/developer/P1197.txt) (just an example of the gaussian smooth filter) The thing is, I don't want to add all the OpenVDB options and filters to the current voxel remesher, which was only designed with sculpting in mind. All that code is there to support the voxel remesh modifier, which is in review. That modifier should have all the options available in a more complex UI and it should be the intended way to use OpenVDB remeshing for things like hard surface booleans or simulation proxies. But if you find a particular filter (or combination of filters) that can be useful for sculpting and they just need a single parameter to control it we can add it to the current sculpt oriented voxel remesher.

paul geraskin commented

2019-12-30 20:49:20 +01:00

@Regnas Yeah, VDB Smooth would be nice.

@PabloDobarro Thank you for answering! You move blender to the best sculpting app. )
For sculpting I would add only VDB Smooth filter. ZBrush has it too for Dynamesh. Zbrush has Blur(filter) = 2 by default.

In Houdini the VDB Smooth filter has 3 parameters:

We could leave Operation=Gaussian for sculpting which will not be in UI. And add 2 parameters for smooth - Iteration,Voxel Radius.

About the VDB remesh modifier is super cool news! I guess this is it https://developer.blender.org/D4960
I'll leave an additional post there about the modifier.

I would be happy to see VDB Smooth in the sculpting remesher. It will be useful like in ZBrush.

Also, thanks for the patch but I have never compiled Blender for Windows by myself. (

Thanks.

@Regnas Yeah, VDB Smooth would be nice. @PabloDobarro Thank you for answering! You move blender to the best sculpting app. ) For sculpting I would add only VDB Smooth filter. ZBrush has it too for Dynamesh. Zbrush has Blur(filter) = 2 by default. In Houdini the VDB Smooth filter has 3 parameters: ![image.png](https://archive.blender.org/developer/F8252266/image.png) We could leave Operation=Gaussian for sculpting which will not be in UI. And add 2 parameters for smooth - Iteration,Voxel Radius. About the VDB remesh modifier is super cool news! I guess this is it https://developer.blender.org/D4960 I'll leave an additional post there about the modifier. I would be happy to see VDB Smooth in the sculpting remesher. It will be useful like in ZBrush. Also, thanks for the patch but I have never compiled Blender for Windows by myself. ( Thanks.

Ray molenkamp commented

2019-12-30 21:37:15 +01:00

Guys the bug tracker is not a forum, please do not use it as such, if you would like to discuss this more please use user feedback area at https://devtalk.blender.org/c/user-feedback/13

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[REQUEST] Smooth feature for VDB Remesher #72774