How to create a negative mold from a scanned object?

[karl.wernerJUNVH]

Hi, 

I am very new to Fusion 360 and CAD in general so thank you to whomever can point me in the correct direction.

I have a light that I would like to mount to the front of my car near the fog lights in the front bumper cover. There is currently no way to mount this light since it is designed for another model year of the car that I own. The light is not just a circle. It's a sort of 'L' shape. There is a place where I could mount the light if I can redesign and 3d print a mesh accent piece similar to what is already on the car. However, I need to incorporate a mounting point for the new light.

The light needs to sit within a recessed receiver (like a negative mold) so I can mount it flush against the fog light cover piece. The finished piece will incorporate the hex-angle mesh design of the current fog light cover along with the custom designed receiver (negative mold) for the new light I am mounting. 

I hope that explains the outcome I'd like to achieve. Now here is what I'm planning to do and a question I cannot quite wrap my head around.

My current plan is to use photogrammetry (Polycam) to "copy" the current fog light cover accent piece that is already on my car (I bought a replacement part to photograph so I am not trying to scan the part that is on the car currently). Next, I want to import this scan into Fusion 360 and clean it up as necessary so that I basically get an exact copy of the part that is currently on the car with the addition of the mounting point for the new light. I will need to design a receiver (ie. half of a negative mold) so the current mounting points on the back of the new light have something to attach to and the new light sits recessed within the fog light cover piece.

The only issue is I have no idea how to create this mounting negative mold receiver piece in Fusion 360 and incorporate into the photogrammetry piece that I scanned (and future me will import into fusion 360).

My thought is that there should be some way of creating a negative mold in fusion 360 and then telling the program how thick I would like the 'walls' of the mold to be. Then I need to incorporate this mounting point mold into the scanned piece that I imported into the program. However, I have no idea how to do that. 

I am perfectly willing to watch Youtube videos or read articles in order to learn how to do this. I am sure there might be easier ways to go about achieving the result I want but I enjoy using my car as an excuse to learn new skills so the journey is the point. Thanks for helping me along the way.     

[TheCADWhisperer]

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@karl.wernerJUNVH wrote:

The only issue is...  

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Can you File>Export your *.f3d file to your local drive and then Attach it here to a Reply?

[g-andresen]

Hi,

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@karl.wernerJUNVH  schrieb:

I am very new to Fusion 360 and CAD in general so thank you to whomever can point me in the correct direction.

Then you should first thoroughly familiarize yourself with basic design principles and tools of application on simpler models.

Günther

[wmhazzard]

What I would try is to model the light holder in Fusion, making it as simple as possible, just the part that you need and nothing more. Then in the Mesh workspace, you can tesselate the part, turning it into a mesh. From there, you can combine cut the part using the scan data and convert back into a solid so you can add any additional details. See the attached model. If you don't have the prismatic option when converting to a Brep body, you can use the faceted option and try deleting faces to remove the facets.