Unable to view 3D as designed in the layout

I have designed a PCB from scratch. During the final steps, I’m unable to view the 3D as I have designed in the layout. At first I thought the issue would be due to that I might have missed selecting the Edge Cuts layer. But that wasn’t it. Something else is going wrong.

Attaching the image for your reference. The image is as per the PCB designed in PCB Editor. But in the 3D view those arcs aren’t visible, instead its a flat structure.
Please help if you know the solution.

Have you run DRC, does it show errors/warnings for outline?

The PCB screenshot you posted here miss internal Edge.Cuts objects at openings. Each internal opening must be a filled drawing on Edge.Cuts layer or have their borders made as Edge.Cuts layer figure. They are usually in white color if you didn’t changed the default KiCad palette. Also run DRC as eelik recommended. DRC is pretty informative about missing or wrong things on PCB.

@Niraj_Yadav : please inform the readers always about the used kicad version. For instance there were some issues in the past regarding arcs in the board outline, but we can’t say if thats the problem in your case as long as we don’t know that information.

Its version 8 that I’m using currently

9 errors to be precise, Yes

Which version 8 ? 8.0.1, 8.0.2 ? RC ? Released Build ? Windows ? Linux ? Mac ?

Can you paste your version info here please, you can get it from KiCad > Help > About KiCad > Copy Version Info

image

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I drew a similar PCB outline and for me it “just works” in KiCad V8.0.6.

What are those purple things? I assume it’s the F.Mask layer of pads.
Is this PCB supposed to have internal cutouts on Edge.Cuts, or just the outline?

And what are those errors? Do any of them have to do anything with the Edge.Cuts layer?

For diagnosis, it’s easiest if you simply zip up the project and post it here.

The most likely cause is that the lines on Edge.Cuts do not form a “perfect” outline without any gaps or overlaps. If KiCad can not determine the outline, then the 3D viewer defaults to a rectangle around all parts.

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Top Solder mask perhaps.