shiny objects with CP's

Development Asset Creation
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1

Dear RC users,

I am currently working on capturing a shiny object such in the same manner as the tutorials:

http://janebeecr.blogspot.com/2017/07/how-to-scan-shiny-surfaces.html

https://janebeecr.blogspot.com/2019/10/how-to-scan-shiny-surface-part-2.html

https://www.3dscanstore.com/blog/3d-scanning-reflective-objects

The object I am working on has an aluminum shine/gloss, and I gave this some light white powder to give it features, this is my shiny image upload.

I also covered the same object with white chalk spray and black face paint (as in the 3rd tutorial), “the covered” data set.

So I have two data sets, each of which aligns well individually, but with only the covered version giving a good mesh when previewing reconstruction. The shiny aligns too, but the preview reconstruction is full of holes and dodgy, which is obvious because of the gloss. But I cannot get the two data sets into 1 component. I could only get 1 component using Control Points. So 1 component and disabled meshing for the shiny data set as described in the ‘tutorial’ workflow. But I got an ugly mesh with the preview reconstruction (as if the shiny data is also used for mesh).

Could this be because of the use of CP’s in the covered data set, which align 100% without CP’s? Is there another technique/workflow that I can apply to get 1 component of shiny and covered data, where only the covered data is used independently of the shiny for your mesh reconstruction?

Youri

2

Well what normally you would need to do is shoot it clean, don’t move it. Make it dirty (but not completely covered (cause RC has to see some of the source object to align it together) and then import both datasets where clean goes Alignment enabled Meshing disabled Texturing enabled and Dirty will be Alignment enabled Meshing enabled and Texturing Disabled. If you cover it completely with the coating or dirt you will need the control points. Also as mentioned above you cannot be moving the subject while shooting the passes. That’s the whole magic.

3

 

in itself it is a fixed object on a stick, the object is the same against a white background (turn-table photography).

I have also done the described workflow, but unfortunately I am forced to work with CPs. But can CPs in a dataset affect the mesh?

And what if I didn’t include the photos where I put the CPs in the ‘meshing’ images, would that solve the problem of an ugly reconstruction?

 

Youri

4

Well the CPs can have both good and bad influence, but normally if they’re done right and they don’t present big errors in pixel values shown next to the images under them they should only help. What you do normally is you have two components in the one project. you put control points on the images of one component and then again some on the other. Then you hit align again and the components should connect to a big full one. 

5

I have updated this post. I managed to combine the mesh model with the shiney texture in one component. Textured and exported the model. Tried to open it in meshmixer to see the result. Usually when exporting, the model opens together with the texture in meshmixer. But with this model it seems to open without texture, but with a red surface. Does anyone have an idea what seems to be the problem and how to overcome this. Does meshmixe not support shiny textures or does the whole RC combining the mesh of one with the texture of another data set be the problem?

regards,

Youri

6

I cannot speak for Meshmixer, maybe even there could be an issue, but first let me investigate what could happen on our side.
Could you please give me a screenshot of your export settings you would use here with all the dropdown menus extended?

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Discussion moved to https://support.capturingreality.com/hc/en-us/community/posts/360007538220-Opening-model-with-shiny-texture-in-Meshmixer