others_settings_brim
Brim is a flat layer printed around a model's base to improve adhesion to the print bed. It is useful for models with small footprints or those prone to warping.
Controls how the brim is generated on a model's outer and/or inner sides.
The Auto brim feature computes an optimal brim width by evaluating material properties, part geometry, printing speed, and thermal characteristics.
- Model geometry
- Uses the model's bounding box to determine dimensions.
- Height-to-area ratio:
height/(width²*length).
- Printing speed
- Higher maximum printing speeds generally increase the recommended brim width.
- Thermal length
- Defined as the diagonal of the model's base.
- Reference thermal lengths (material-specific):
- ABS, PA-CF, PET-CF: 100
- PC: 40
- TPU: 1000
- Material adhesion coefficient
- Default: 1
- PETG/PCTG: 2
- TPU: 0.5
The computed brim width is capped at 20 mm and at 1.5× the thermal length. If the final width is under 5 mm and also less than 1.5× the thermal length, no brim will be generated (width = 0).
Generates a brim only on areas that have been painted 
in the Prepare tab .
Creates a brim around the model's outer perimeter.
Easier to remove than an inner brim, but may affect the model's appearance if not removed cleanly.
Creates a brim around inner perimeters.
More difficult to remove and less effective than an outer brim and may obscure fine inner details, but it can hide the brim removal seam.
Creates a brim around both the outer and inner perimeters of the model.
This approach combines the disadvantages of both brim types, making it more difficult to remove while potentially obscuring fine details but improving overall adhesion.
Tip
Consider using a raft on complex models/materials.
Mouse ears are small, local brim extensions (typically placed near corners and sharp features) that improve bed adhesion and reduce warping while using less material than a full brim.
The geometry analysis routine selects candidate locations based on the configured angle threshold and detection radius.
Angle threshold (degrees) used to decide where mouse ears may be placed:
- 0° — disabled; no mouse ears are generated.
- Between 0° and 180° — ears are created at features with local angles sharper (smaller) than the threshold.
- 180° — ears are allowed on almost any non-straight feature.
The geometry will be decimated before detecting sharp angles.
This parameter indicates the minimum length of the deviation for the decimation.
0 to deactivate.
Distance between the model and the outermost brim line.
Increasing this value widens the brim, which can improve adhesion but increases material usage.
Gap between the innermost brim line and the object.
Increasing the gap makes the brim easier to remove but reduces its adhesion benefit; very large gaps may eliminate contact and negate the brim's purpose.