My problem is difficult to describe, the easiest way to understand it is with pictures.
I’ll try to explain it using the butterfly.
The butterfly was created in Fusion and the colorful wing parts are solid color all the way down.
So the outline is black and the wings are pink.
If I now export the file from Fusion and load it into Bambu Studio, the top layer is printed correctly, but as is well known, you need at least 3 or even more layers in the same color so that it is not distorted by the color layers underneath.
However, the slicer changes the colors of the objects and only colors the top layer completely correctly.
With other objects too, I often see that the color arises in the middle and then spreads further outwards towards the top. However, this then changes the entire color gradient of the top layer.
I hope you can understand what my problem is. I hope that the pictures can make the whole thing clear.
I would be happy if someone here has a solution so that the slicer leaves my objects colored the way I exported them from Fusion.
I have already tried STL, OBJ, 3MF and others. Breaking the print down into parts in Bambu Studio and then manually assigning the correct color again didn’t help either.
One function I would love to see added to Bambu Studio in the future is the ability to set the depth of things colored with the paint bucket. Currently you can color by layer but then the edges of the object show the color also. I think Studio is treating the colors you bring over from Fusion like they were painted with the paint bucket.
I do have one suggestion that I think would work, but you would have to paint the item in Studio. If you make the whole butterfly the lighter shade of pink, then paint the outside edges black and the bottom of the wings purple it should work. The black and purple will cover the lighter color without it showing through.
If anyone has a method to get it to work from Fusion hopefully they’ll chime in also.
Now that one doesn’t make sense to me. Did you remove the manual painting ( if present ) prior to the by object painting.
Can you post your project 3mf file?
thanks for your answer. That would be a workaround. But my problem is just a example for many Files. I would love a real solution for that problem! I would love to see an ability to set colors for multiple layers in bambu studio, too.
I just found out something interesting. If I split the file into parts, then I can move individual objects. If I then move a wing out and slice it, then the part is sliced in the correct color from top to bottom in the correct color.
I checked your file and it looks like you imported it from a OBJ file and from my experience those seem to cause an issue in the Bambu slicer.
Export as STEP from Fusion and try that one in Bambu studio.
Oh wow!! You fixed it! You must be the Bambu Studio God.
I will try that too. You just clicked fix model on every part and thats it?
I have to try it right now. Thank you so much!
Nope no God but I have my share of experience with multicolor and issues thereof.
OBJ files seem to cause overflow issues in nested parts with different colors. Fix Model can fix it but it is not a guarantee, better to use another file format like STEP when saving/exporting files.
Another tip if you may allow me, as is that part would have many color changes thus takes more time, generates wasted filament and increases the chances of failure, better to design with color insets only on the visible ends with a defined depth or, as I did here, cut each colored section into parts in Studio and color the non visible areas to the main body color. Momo v41_modV2.3mf (1.9 MB)
You can do it together but for that you first have to “merge” the four wing objects to make an Assembly at which point the objects will become Parts in the Assembly, now when you split that Assembly you will split each of the Parts within into more Parts within that same Assembly
Can I ask you one more thing? Maybe you know the solution for this too?
If I click “Split to Parts” in my entire file, some bodies are created as objects and some are not. In addition, some bodies stay where they belong and others fall down.
Do you know the reason for this?
In my opinion, using the example of the butterfly, I have now created all four wings the same in Fusion, but only one works properly.
Ok now on this one first run the fix model before splitting and after use Split > to Parts and not Split to Objects since the latter will drop any floating pieces to the plate
My bad, first split to parts and then run the fix Model tool on the top assembly.
Problem is that all your colors will be translated into painting and with it will come out with different color interlocks further down so lots of unnecessary color changes thus wasted time and filament. Removing the painting and then cutting the different parts will be a big work transaction due to the amount of colors and different heights with that model. With something like this a little more work during the actual CAD design can save you lots of time and frustration after for slicing and printing.
I would love to see an ability to set colors for multiple layers in bambu studio, too. 
