Is there an existing issue for this feature request?
Is your feature request related to a problem?
In multicolour prints, generated features such as brims and support interfaces can be printed using a filament colour that does not match the model surface they touch.
This can leave visible remnants of the wrong colour after the brim or support is removed.
For example:
- A black section of a model may have a white brim attached to it.
- A red painted surface may be supported by a blue support interface.
- A build plate containing objects of several colours cannot be handled correctly by choosing one global brim or support filament.
The existing option to select a single support filament, or control the first-layer filament sequence, does not solve this for genuinely multicolour models.
Which printers will be beneficial to this feature?
Klipper, All
Describe the solution you'd like
Requested behaviour
Please add an option such as:
Filament: Match contacting model
for:
- Brims
- Support interfaces
- Ideally other generated structures where appropriate
The slicer would determine which model surface or perimeter each generated region touches and use the same filament assigned to that model region.
For example:
- Red model perimeter → red brim
- Blue model perimeter → blue brim
- Green model perimeter → green brim
And:
- Support interface touching a red painted surface → red interface
- Support interface touching a blue painted surface → blue interface
This should work independently for different regions of the same object and for multiple objects on the same plate.
Why this is preferable to a manual filament selector
A single selectable "Brim filament" or "Support interface filament" only works if every relevant model surface uses the same filament.
It does not solve cases where:
- one model has multiple colours on its first layer;
- several differently coloured objects share a plate;
- different support interfaces touch differently coloured sections of a painted model.
The assignment therefore needs to be spatial rather than global.
Suggested implementation concept
Generated ancillary geometry could inherit its filament assignment from the model geometry it contacts.
Where generated geometry contacts multiple filament regions, it could be divided into regions based on the nearest/contacting model perimeter or supported surface.
A possible UI option would be:
Brim filament
- Auto
- Filament 1
- Filament 2
- …
- Match contacting model
Support interface filament
- Auto
- Filament 1
- Filament 2
- …
- Match contacting model
Related upstream requests
This appears to combine two existing OrcaSlicer requests into a more general solution:
Rather than treating brims and supports as unrelated special cases, a general “inherit filament from contacting model geometry” behaviour could solve both.
Printers affected
All printers capable of multicolour or multi-material printing, particularly systems with multiple toolheads or automatic filament changing.
For Snapmaker U1 in particular, this would make multicolour support and brim behaviour much more consistent with the colour assignments already made to the model.
Describe alternatives you've considered
Changing the colour of the brim or ALL supports is not helpful because in multicolour models the parts have different colours on layer 1 also different overhangs have different colours so a single support interface colour isn't suitable either.
Additional context
No response
Is there an existing issue for this feature request?
Is your feature request related to a problem?
In multicolour prints, generated features such as brims and support interfaces can be printed using a filament colour that does not match the model surface they touch.
This can leave visible remnants of the wrong colour after the brim or support is removed.
For example:
The existing option to select a single support filament, or control the first-layer filament sequence, does not solve this for genuinely multicolour models.
Which printers will be beneficial to this feature?
Klipper, All
Describe the solution you'd like
Requested behaviour
Please add an option such as:
Filament: Match contacting model
for:
The slicer would determine which model surface or perimeter each generated region touches and use the same filament assigned to that model region.
For example:
And:
This should work independently for different regions of the same object and for multiple objects on the same plate.
Why this is preferable to a manual filament selector
A single selectable "Brim filament" or "Support interface filament" only works if every relevant model surface uses the same filament.
It does not solve cases where:
The assignment therefore needs to be spatial rather than global.
Suggested implementation concept
Generated ancillary geometry could inherit its filament assignment from the model geometry it contacts.
Where generated geometry contacts multiple filament regions, it could be divided into regions based on the nearest/contacting model perimeter or supported surface.
A possible UI option would be:
Brim filament
Support interface filament
Related upstream requests
This appears to combine two existing OrcaSlicer requests into a more general solution:
Rather than treating brims and supports as unrelated special cases, a general “inherit filament from contacting model geometry” behaviour could solve both.
Printers affected
All printers capable of multicolour or multi-material printing, particularly systems with multiple toolheads or automatic filament changing.
For Snapmaker U1 in particular, this would make multicolour support and brim behaviour much more consistent with the colour assignments already made to the model.
Describe alternatives you've considered
Changing the colour of the brim or ALL supports is not helpful because in multicolour models the parts have different colours on layer 1 also different overhangs have different colours so a single support interface colour isn't suitable either.
Additional context
No response