Seam painting

Starting from PrusaSlicer version 2.3, it is possible to paint on seams on your model. The seam painting tool provides more detailed control over the seam placement. The tool is accessible from the left toolbar, and it is only shown in Advanced and Expert modes. After clicking on the icon, the user can paint 'Seam enforcers' or 'Seam blockers' on the model.

Seam placement logic

If there is a seam enforcer, it always places seams into the enforcer area.

If there is a blocker, its area is excluded from possible seam candidates.

The Nearest, Rear, and Random Seam position options are still respected. When the Aligned option is active and enforcers are used, the seam is placed in the middle of the enforcer area. This allows drawing smooth seams over the model.

Left mouse button: Enforce seam

Right mouse button: Block seam

Shift + Left moue button: Erase selection

Brush size: Can also be accessed by the shortcut Alt + Mousewheel. Click the "Edit" icon on the side to add a specific number.

Cursor type

Spherical cursor (default)

Paints everything inside the sphere, regardless of whether it is visible or not from the current view. The preferred method for most cases.

Circular cursor

Paints all visible places inside the circle from the current view, possibly leaving unpainted areas, but never painting behind corners.

Clipping of view

You can use the clipping plane tool to hide a part of the object, so that difficult to reach areas can be easily painted. Move the slider from left to right to move the clipping plane. Click the "Edit" icon on the side to add a specific number.

8 comments

Swiss_Cheese

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This may help some of you.
https://forum.prusaprinters.org/forum/prusaslicer/pro-tips-the-brush-tool-by-swiss_cheese/

Excalibur2811

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It would be nice to see some example diagrams explaining this here..

Same Old Shane

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there are links in this article pointing to other ones about seams. Did you check there?https://help.prusa3d.com/en/article/seam-position_151069

Tim Angus

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I signed up just to echo the comments regarding being able to paint straight lines. Seems (lolz) like doing this would be the more common case than not, tbh.

David

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Hi Tim! The painted line is just an approximate point of where the seam should be located. Anyway, you can report a bug/ request a feature at github.com/prusa3d/PrusaSlicer

Tim Angus

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Apparently there already is one https://github.com/prusa3d/PrusaSlicer/issues/5970
EDIT: or, several actually, but they're mostly duped to that one.

David

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The problem might be even if you paint a straight line, the seams are not perfectly aligned. By the way for painting a straight line, you can sort of utilize another bug, you start painting a seam and while holding the left mouse button, you hit escape. then you enter the seam painting mode again and just click the end destination.

mchahn

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Thanks for the trick! It works perfectly. I put the object half off the window and click top and bottom on the very edge. This makes the line perfectly vertical.

Ramage

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Two years later this 'bug' still works. Thanks for the tip.

Spinnetti

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Excellent find... Straight line selection is sorely missing!

DeMelo

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Painting the seam is great, being able to draw straight lines in prusaslicer would be even better. But in my opinion the best way to precisely control seam positioning would be by creating a modifier mesh with your favorite modeling software and then importing it to prusaslicer to overlap with the printing model. The intersection lines would define the z-seam path.Cura offers a similar tool, but to control settings other than seam positioning.

Hermes Endakis

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You can draw straight lines with your mouse on a Mac using an Accessibility option called 'Mouse Keys' that lets you use your keyboard to move the mouse around the screen. https://support.apple.com/en-au/guide/mac-help/mh27469/mac