I’m hoping there is some way to enforce a particular order for a colour change before printing the infill on a multicolour/AMS print. The example I’m working with is a primarily white object with black inset text. The infill for layers with text involved alternates between white and black - which is normally great for only doing half the colour swap/purge/prime it would otherwise do, but black infill shows up through a ridiculous number of white walls and spoils the look of the finished piece.
Is there any way in Bambu Studio to directly control the colour of infill to avoid this?
Maybe there is a setting in orca?
I honestly dont know because i havent tried it myself.
but there is purge in infill which kinda works the same except it mixes the two colors together.
Thanks, but it’s not about purging to infill. The normal way the slicer handles colour changes is to go e.g. white layer 1, black layer 1, black layer 2, white layer 2, white 3, black 3, black 4, white 4, white 5, black 5, etc., which means 1 colour change per layer. Over the top of that there is another sequence of wall, infill, wall, infill, wall, infill - and so the infill lands in alternating colours. You can change the walls to be done first or second, but there doesn’t appear to be any way to enforce the infill to only be done in one colour (and I suspect this would require 2 colour changes per layer).
At least in Bambu Studio - I haven’t tried raw Orca yet, I’ll take a look and see.
Depending on the complexity of the model, you can achieve this with primitives or even complex model shapes turned into modifiers.
For the purpose of this example, you model is a basic cube.
Add a cube primitive as a modifier, resize and change location to match the infill portion of the model and then in the object panel set your choices for colour and anything else.
For more complicated models, create a version of your model as suitable to occupy the infill sections, add it to the build plate with your actual model, assuming you positioned it well in your CAD application agree it is a single model of parts. In the object panel, select the modified variant, right click and change type to modifier and do the stages fro the simple example.
Unfortunately this does nothing for the infill colour, just wall colour. I can successfully use a modifier component to change wall colours, but the infill doesn’t obey the colour settings the modifier imposes.
I successfully salvaged christmas by reducing the depth of the inset text colour so that it is exactly 1 layer shallower than the wall, so that there is a full white layer before the infill starts - but that only worked because I have an entirely horizontal print where that text wall matches perfectly to layer changes, there is still a need for infill colour/filament control as a feature. It would also be relevant where you have an expensive pretty filament for the outside walls, and want to use cheap basic stuff for the infill.
There’s also unfortunately no way to do this in raw Orca either, just old requests going back a year or two for Orca and Bambu Studio to add this functionality.
Text is treated as an object. So you can switch to the “Objects” view, right click the text object and then change its type to a modifier. That will have a number of advantages such as making sure that the volume of the Text is printed in the color assigned by right clicking on what is now a modifier rather than an object.
Edit: I think this also what @MalcTheOracle suggested. Sometimes you need to create one object type text and one modifier type text, for example for protruding text or special applications such as text surrounded by infill only.
There are two caveats though:
- Around the modifier, the part it is emplaced in will apply its outer surface, i.e. wall number loops will be placed.
- Modifiers are applied in the order they appear in the assembly. So you may need to shift their order in the build tree.
Edit 2: Bottom view of a copper Text Modifier in a marble Text Object in a marble “No top/Bottom Surface” Object
Top view
The text is not created in Bambu Studio, it’s a 3d model I create elsewhere and import. The fact that it’s text is not the core issue, and there is no infill in the text itself or on the same layers as the text, it’s all solid wall. It’s overlaid flush into a larger model, so that the eventual surface is flat but the text model with one colour is merged into an assembly with a larger object of another colour. The issue arises where there is infill in that larger object immediately after the text is finished, which takes on the colour of the text (because it is more convenient in terms of colour swaps for the slicer to do it that way). Or if there is another colour in some other object, and it’s more convenient to use that colour for the infill someplace else - infill doesn’t respect any colour instructions at all.
There’s a weirdness with the behaviour of those modifier objects. They sort of can apply colours to infill, if they exist entirely within the parent object, and can insert those walls. Which means they aren’t actually applying the colour to the infill at all, the infill just naturally inherits the wall colours when those walls get added. Applying a modifier object that completely eclipses the object from a certain layer up (like I would normally do to change infill density or something) doesn’t add any new walls and doesn’t change the infill colour.
Adding walls to achieve the infill colour doesn’t really do anything for my current case, because I already have all the walls I want on this model (and they’re already the correct colour). I essentially did this already with my single layer of white wall hack. Good to know for other projects that might run into this issue though, thanks.
Key is to have a modifier object that has the exact shape of the color modified area. It does not matter if that is wall, surface or infill (unless it is those parameters that are being modified).
In your case, that is the text. If you have created that as a separate stl, you can just import that as a modifer rather than an object. If it is already an integral part of a single stl, it gets more complex and you may need to share a 3mf to facilitate troubleshooting.
In that particular case, using a height type volume modifier is a logical approach but it is curious as to why it should keep the infill black.
How did you apply which color before the modifier? Using surface painting? That has its own issues. And do you have a screenshot of your object tree?
