Hi.

I have received a scan of a figure that is resin and 5.7cm tall , in rendered view (default settings Rhino V5) Scan1 shows defined pocket seams, stitching marks, press studs, buckles etc.

There was a flaw on part of it.

The file received (Scan2) less the flaw was a little softer on the detail definition.

It was then sent again (Scan 3), it looks exactly the same as Scan2.

Do the figures from Rhino show why ?

Scan1 was:-

70,687kb

Closed double precision

polygon mesh: 983,014 vertices,

1,444,850 polygons with normals

(145% more vertices than Scan2)

(117% more polys than Scan2)

Scan2 was :-

60,206kb

Closed double precision

polygon mesh: 676,249 vertices,

1,230,718 polygons with normal

(68% vertices of Scan1 )

(85% polys of Scan1)

(85% of Megabytes of Scan1 )

Scan3 :-

76,588kb

Closed double precision

polygon mesh: 848,511 vertices,

1,565,592 polygons with normals

(86% of the vertices that Scan1 has)

(108% more polys than Scan1)

(108% more Megabytes than Scan 1)

[ 125% more vertices than Scan2 ]

[ 127% more polys than Scan2 ]

I am told vertices are the lines between polys, so how become the Scan3 has 85% vertices and 108% polys compared to Scan 1 ? i.e. polys increase vertices decreased.

I think if the vertices equal or increase to those of Scan1 then it will be as good as Scan 1. Vertices hold the key. Am I right ?

How become, comparing Scan 3 to Scan 2 they look exactly the same, yet Scan3 is 125% more vertices than Scan2 and 127% more polys than Scan2 ?

I think the figure was re-scanned for Scan2 then this ‘large’ scan resampled, or whatever the term is, to create a file of workable megabyte size, scan3 is taking the ‘large’ Scan2 and re-sampling it again.

I know that an initial scan was 400Mb and hell to download let alone get into Rhino, and yet when I did manage to, it had a surface as if made of chards of glass ! Since then a 19Mb file also had the same effect. Its not the size, its what you do with it !

Just what I wonder will a scan matching Scan1 have ?

Can one extract from a master scan an .stl file and dictate the number of vertices ?

Cheers

Steve