using the metroy ultra on some metallic parts i see really bad ghosting. granted im not the most experienced with scanning but i expected the software should be able to filter some of this out.
I am using 0.15 point distance, Metallic mode, and either Parallel or cross lines mode in hires mode.
Not sure what im doing wrong. The built-in tools can take away only some of the ghosting in fused processing.
These are all of the same part.
Is there a technique i need to use or
I too have these same noise artifact issues with my Pro version. Same type of casting.
Looking forward to a solution or workflow to improve my scans.
One thing you could try is adding some scanning spray, a light dusting will help. Cast is usually rough enough that its ok to scan without issues. Looking at your picture again, it looks like you dont have enough markers. The revopoint scanners are on the small side for FOV so they like to have a lot of markers. I’d try to stick to one size marker as well if you can. Did you get “tracking lost” notifications a lot?
Did you merge two scans, because it almost looks like what happens when you have overlapping scans that dont merge perfectly.
I scanned some pretty shiny metal parts the other day with my MetroY Pro with minimal reflection. This was shinny machined aluminum.
Hi @bxp
You do nothing wrong , the micro reflections from metal creates the artifacts that usually should be eliminated by cleaning the scan from lose points or overlapped points , if you can’t clean it this means the edges was not fully captured and there is not enough data on that areas .
How higher the fusing settings how higher the level of artifacts can be in this case .
I see a lot of micro reflections in the raw file , it can happen when scanning reflective materials , maybe next time try not to use the metal settings and use manually lover setting for the laser brightness , absolutely don’t touch the exposure or set it on auto .
For the Laser brightness set it lower to avoid too many micro reflections , from the picture that I see it should works just fine .
Use metal settings only on highly reflective metals like chrome or stainless steel.
Or use 3D scanning spray if the surface is very highly reflective but I don’t think you need that for the object in the picture
so exposure should be minimum? and use general setting?
Exposure set on Auto for best results .
Laser Brightness start at 5 and see in the preview windows if it scan ok , if not increase it but I think you will not need more than level 7 for the Laser brightness with this type of surface.
I have tried using opposing model types to get better results scanning intake manifolds. Also use those noise patches and place markers where they persist. On really difficult pieces target and concentrate on the difficult geometry by adding an seemly excessive amount of markers around just that patch. Post process and clean it up. Cut the desired geometry out and merge it back into your final model.
Repeat as necessary 
Hi @cc454 with laser scanning the all edges and crevasses need to be fully captured , laser scanning requires lots of data ( frames ) for this size of object at least 20K of frames minimum to start with , if some area has lower data level the edges will be full of artifacts.
The point cloud need to be completely clean and cut before merged with other clean scan , after merging you need to run also cleaning to remove overlapped points to avoid uneven surface while merging , why ? Because sometimes your distance is not exactly at the same distance between scanning , and that can affect slightly the volume , so after merging the difference need to be cleaned before moving to meshing or exporting for reverse engineering.
If you have huge issue cleaning scans , try free Cloud Compare software , it have fantastic cleaning tools for point clouds with one click .
