Hi, so I am trying to create a lampshade. It is basically a hollowed orb like shape. But! If I hollow it in CAD, the slicer doesn’t keep the same line attributes through, causing parts to be darker (mainly the top where it comes together)(there are thinner and thicker inner walls, gap infills etc.). If the shape is a whole solid, the slicer is able to maintain the same concentric lines (wall loops) all the way to the top but creates a bridge where the overhang is too severe. This is where supports would be lovely. I really wish there was a way to allow for supports inside an object!
I have to imagine the shape has an opening, so why not place that opening on the bed and then the supports can go upward from there?
In terms of modeling, you should model your part as a solid object consisting of your desired wall thickness and an empty inner volume - make sure arachne walls are enabled, and then whatever you’ve designed your wall thickness to will be maintained.
I’ve tried this and the issue with this is still the same. Wall thickness is the “same” but where there is overhang at the top, the Bambu slicer chooses to create infill in those layers (in line type, it’ll show as inner wall, sometimes gap infill, some as internal solid infill(which all show as different line width in the preview) to support the overhang (resulting in the top being darker) rather than when it is a full solid form (without the hole at the bottom you’ve mentioned) the slicer is able to have the wall loops the same till the top. (With and without Arachne walls) I think the main issue as I’ve found is the inconsistency in line type used through out, where it is creating that overhang with 2 lines at different line widths in some places, and 1 at another, it’s creating areas that appear thicker/darker after printing) (with solid infill 0%, all layers are able to maintain 3 wall loops, with a hollowed model, the overhanging layers has many more variable line loops)
Would you be willing to share one of your models, or at least something similar, so I can poke around and try a few things? I have a few ideas but it would take longer to explain them.
That would be amazing, but if its okay, I’ll need a few minutes
Plate 1 is what I have ended up doing, plate 2 is where I tried the hollowed shape in modeling, plate 3 is the solid shape. In preview mode (showing line type), the problem I am having more obvious. (I’ve also played around a lot a bunch of settings including the wall thicknesses, which didn’t seem to help) https://drive.google.com/file/d/1Ibj0xjvXz3mExQId4cne-QyfMb7vRZGh/view?usp=sharing
I’ve probably printed about 16000000 prints too many so I really appreciate the help! (They are big and when i’ve tested smaller, the don’t have the same issues)
Holy moly, I know that wasn’t the question, but you should definitely check your workflow or export settings: 130 MB - just opening that file makes even my high-end computer sweat.
Even Bambu Studio is already displaying a warning message:
…and we’re only talking about three simple spheres here:
Your level of detail is roughly 100 times higher than what the printer itself can even produce with a 0.2 nozzle.
Just to give you an idea of the scale: The level of detail of an entire building in CAD crammed into one sphere. Or to use another analogy: If you scan a person and can see even the microdetails at the level of individual pores. I quickly checked it in Blender - we’re talking about 9 million faces!
Check your workflow - as I said before, that’s extremely unusual for just three spheres. You’ve easily overshot the limit of what your printer can print by a factor of 100.
Hi yeah, you are totally right with that (making me sweat 
) (I do have model versions with less… idk why I keep using this one anyways(self sabotage sometimes) but I don’t really think that is the issue I have, and I apologize for making it harder for me to get help, but really appreciate it!! (I think at one point my shape look facetted and I went a little overboard and over over corrected 
) And thank you so much for even being willing to open the file.
So I’ve tried several times now - with Bambu Studio, with Blender - and they’ve all failed. The main problem is that you really need to prepare this in CAD, and to adjust the walls in CAD so that they’re uniform, while taking the wall thickness of your nozzle into account.
Maybe someone else has an idea or a workaround.
I took a look at how others do it and came across this lamp. It works just fine without any support - and it’s completely hollow inside. Maybe you could take some settings and ideas from it:
Thanks for the thought! Something I’ve also tried is meshmixer, and i’m pretty sure the thickness is even, but once its in the slicer I get the same, i’m really just wanting it to treat it like a wall loop and not infill. As for CAD, I’m looking for an organic looking egg shape and haven’t been successful. I think with the moon globe the problem i have kind of plays to their advantage, their texture kind of hides away those darkened areas/swirls… at one point I tried adding more surface texture but I don’t think I did it well/naturally. I think I might have to just be satisfied with the dark halos near the top 
.
Make them even darker and say it’s on purpose. As silly as that sounds. Maybe it’ll even look good. Designer lamps do that, too. If you can’t get rid of it, turn it into a design feature. I really mean this - no sarcasm - turn a flaw into something positive and even make it stronger / darker.
I appreciate this a lot, and I’m going to have to think about it. I don’t know if my execution would be on par. Definitely, this has been a big learning curve for me. I am originally more comfortable with CAD. Printing those forms hasn’t been much of an issue for me. Took an opportunity making something more organic and complex by 3D scanning on my phone and playing around with it in digital sculpting, was fun, great but then moved onto this next thing thinking I have some experience with more organic forms, but this being a simple but organic form has really gotten to me in a way I didn’t think it would.
It’s time for me to mutter something about lampshades and vase mode
Was just thinking of this vid when I saw your post.
