This project is based on the excellent work of MakerWorld user PandaN, who shared a method for adding wood grain effects to 3D prints using a modifier mesh shaped like a log. However, the original 3MF is only compatible with Bambu Studio, and cannot be opened in PrusaSlicer. This upload re-creates the setup for PrusaSlicer users.

What you’ll find in this file:

• A pre-configured 3MF file that works directly in PrusaSlicer.

• The included modifier mesh (log with concentric rings) set up to apply the correct print settings.

• A simple sample cube (“replace me”) so you can test the technique immediately.

You don’t have to use a log as the modifier - any organic mesh can give unique textures. Experiment with different shapes to mimic leather, stone, or woven patterns. 

Tutorial for creating textures with a modifier model:

Note: You don’t need to follow these steps to use the included 3MF - it’s already pre-configured. This guide is just here if you want to understand how the setup works or adjust it for your own projects.

PandaN's method uses a modifier mesh (in this case, a model of a wood log) to apply special print settings only to the parts of your model that the modifier touches. By tweaking infill angles, top/bottom fill patterns, and adding fuzzy skin, you can imprint a convincing wood grain texture directly into your prints.

Step 1 – Switch to Expert Mode

• In PrusaSlicer, go to the mode selector (top right) and switch to Expert mode.
  This unlocks the advanced modifier options you’ll need.

Step 2 – Add the Modifier Mesh

1. Place your model on the build plate.

2. Right-click your model → Add modifier → Load… → From Gallery.

3. In the gallery window, click Add and load your modifier STL (e.g., log-wood-grain-modifier.stl).

4. Select it in the gallery and click OK.

5. Align/scale the modifier so it fully covers the part of your model you want textured.

Step 3 – Apply Settings to the Modifier

On the right-hand side panel, you’ll now see the modifier listed beneath your model (with a small cogwheel).

1. Click the cogwheel → Add settings.

2. Add:

   • Fuzzy Skin

   • Infill

   • Layers & Perimeters (optional, but recommended for strength and clean layering)

These settings will apply only where the modifier overlaps your model.

Step 4 – Recommended Starting Settings

Fuzzy Skin

• Enable Fuzzy skin on outer walls

• Fuzzy skin point distance: 1 mm

• Fuzzy skin thickness: 0.08 mm

Infill

• Fill angle: 135° (important: use ~90° offset from the global infill angle, which defaults to 45°)

• Fill pattern: Grid (but experiment with others)

• Top fill pattern: Aligned rectilinear

Layers & Perimeters

• Use at least 2 solid layers top/bottom.

• I’ve had best results with 4 solid layers in testing.

• Slice and check to ensure the top and bottom show the pattern clearly.

Step 5 - Slice & Print

Slice your model and preview the toolpath - you should see distinct texture variations where the modifier overlaps. On the finished print, the combined infill orientation, fuzzy skin, and layer choices will create a natural-looking wood grain effect across the surface.

Example prints and post processing:

@ManelTo designed this tray and treated it with varnish to really bring the wood effect to life:

These examples are untreated, and all printed in Sunlu wood fiber PLA of various colors.