[Feature] Add a new feature that allow user to insert extra solid infills #2300

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MrUnknownDE · 2026-04-06T03:33:30+02:00

MrUnknownDE commented

2026-04-06 03:33:30 +02:00

Originally created by @SoftFever on 9/2/2025

Description

Insert extra solid infills at specific layers to add strength at critical points in your print. This feature allows you to strategically reinforce your part without changing the overall sparse infill density.

The pattern supports two formats:

Interval Pattern

Simple interval: N - Insert 1 solid layer every N layers, equal to N#1
Multiple layers: N#K - Insert K consecutive solid layers every N layers
Optional K: N# - Shorthand for N#1

Examples:

5 or 5#1    # Insert 1 solid layer every 5 layers
5#          # Same as 5#1
10#2        # Insert 2 consecutive solid layers every 10 layers

Explicit Layer List

Specify exact layer numbers (1-based) using comma-separated values. Each entry may be a single layer N or a range N#K to insert K consecutive solid layers starting at layer N:

1,7,9       # Insert solid layers at layers 1, 7, and 9
5,15,25     # Insert solid layers at layers 5, 15, and 25
5,9#2,18    # Insert at 5; at 9 and 10 (because #2); and at 18

Note

Layer numbers are 1-based (first layer is layer 1)

#K is optional in both interval and explicit list entries (N# equals N#1)

Solid layers are inserted in addition to the normal sparse infill pattern

Tip

Use this feature to:

Add strength at stress concentration points

Reinforce mounting holes or attachment points

Create internal structure for functional parts

Add periodic reinforcement for tall prints

Insert a single solid layer at a specific height by using an explicit list with a leading 0, which will be ignored because layer indices are 1-based. Example: 0,15 inserts a solid layer only at layer 15.

Warning

Layers that include solid infill can take significantly longer than surrounding layers. This time differential may lead to z-banding-like bulges. Consider adjusting cooling or speeds if you observe artifacts.

Screenshots/Recordings/Graphs

Tests

*Originally created by @SoftFever on 9/2/2025* # Description Insert extra solid infills at specific layers to add strength at critical points in your print. This feature allows you to strategically reinforce your part without changing the overall sparse infill density. ![extra-solid-infill](https://github.com/SoftFever/OrcaSlicer/blob/main/doc/images/fill/extra-solid-infill.gif?raw=true) The pattern supports two formats: ### Interval Pattern - **Simple interval**: `N` - Insert 1 solid layer every N layers, equal to `N#1` - **Multiple layers**: `N#K` - Insert K consecutive solid layers every N layers - **Optional K**: `N#` - Shorthand for `N#1` Examples: ``` 5 or 5#1 # Insert 1 solid layer every 5 layers 5# # Same as 5#1 10#2 # Insert 2 consecutive solid layers every 10 layers ``` ### Explicit Layer List Specify exact layer numbers (1-based) using comma-separated values. Each entry may be a single layer `N` or a range `N#K` to insert K consecutive solid layers starting at layer N: ``` 1,7,9 # Insert solid layers at layers 1, 7, and 9 5,15,25 # Insert solid layers at layers 5, 15, and 25 5,9#2,18 # Insert at 5; at 9 and 10 (because #2); and at 18 ``` > [!NOTE] > - Layer numbers are 1-based (first layer is layer 1) > - `#K` is optional in both interval and explicit list entries (`N#` equals `N#1`) > - Solid layers are inserted in addition to the normal sparse infill pattern > [!TIP] > Use this feature to: > - Add strength at stress concentration points > - Reinforce mounting holes or attachment points > - Create internal structure for functional parts > - Add periodic reinforcement for tall prints > - Insert a single solid layer at a specific height by using an explicit list with a leading 0, which will be ignored because layer indices are 1-based. Example: `0,15` inserts a solid layer only at layer 15. > [!WARNING] > Layers that include solid infill can take significantly longer than surrounding layers. This time differential may lead to z-banding-like bulges. Consider adjusting cooling or speeds if you observe artifacts. # Screenshots/Recordings/Graphs ## Tests

MrUnknownDE closed this issue

2026-04-06 03:33:30 +02:00

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Reference: github/OrcaSlicer#2300