multi color painting issue

[Murphy]

Hey gang,

I was hoping someone might have some insight into why this problem is occurring for me and possibly how to correct it. 

I want to differentiate between the new and existing parts of a building renovation project. After I’ve colored the surfaces and slice (picture 1), there are several areas where the second color pokes through or seems to be printed randomly (picture 2) on the exterior and within. I understand Prusaslicer is trying to color the first few perimeter/exterior layers with the selected color, but why does it create those additional shapes and perimeters within the infill (picture 3)? 

-I’ve tried different paint tool types (brush, smart fill, and bucket) all with the same results.

Any thoughts?

Much appreciated,

Murphy

[3D Printing Tips and Tricks]

It looks to me as though you have locations that are overlapping. Are these two stls or one that’s been virtually painted?

[Bryan Eckert]

I believe it does this so the tool path isn’t crazy tiny where those windows are. 

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[Kurt The 3D Printer GUY!!]

Andy - he mentioned multiple paint techniques - " -I’ve tried different paint tool types (brush, smart fill, and bucket) all with the same results".
But, you were hinting at what I was going to suggest. 

Murphy - if you have the building in parts - like Walls as one part - Roof as another part - it would be Much easier that way to assign colors/filaments. And, if you do it that way - it will be Much, MUCH EASIER than trying to Paint things!

Dang - just as I was finishing my reply - I see Google here telling me that there is a New reply from Bryan - and I bet he's going to suggest the same thing...

-K

[3D Printing Tips and Tricks]

In the presliced image the white area looks like a separate stl.The presliced image does not show windows colored orange yet in the sliced image the windows are orange.

A closeup on the image with both white and orange shows very tiny spots of orange in the edges of the white windows,  indicative of two separate parts in the same location.

[vr...@optonline.net]

Andy - interesting insights into the pics. I did look closely at each. It did kind of Seem like there were multiple parts colored separately - as though colors were assigned via STL. Although, in his posting - the OP kept referring to painting of colors. But, if he Does have multiple STL files - and was originally assigning color/filament based upon STL part - then maybe part of his problem is - as you stated - issues with the STL files and Overlapping of parts - which could truly be the Crux of the problem!

 

-K

 

------ Original Message ------
From: 3d-printing-...@googlegroups.com
To: 3d-printing-...@googlegroups.com
Sent: Monday, December 15th 2025, 06:50 PM
Subject: Re: multi color painting issue
In the presliced image the white area looks like a separate stl.The presliced image does not show windows colored orange yet in the sliced image the windows are orange.

A closeup on the image with both white and orange shows very tiny spots of orange in the edges of the white windows,  indicative of two separate parts in the same location.

 

On Monday, December 15, 2025 at 3:07:28 PM UTC-8 bigyel...@gmail.com wrote:
 

To unsubscribe from this group and stop receiving emails from it, send an email to unsub...@googlegroups.com">3d-printing-tips--tricks+unsub...@googlegroups.com.
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[Murphy]

This had been virtually painted, but the color was not importing or visible so I had opted to paint in PrusaSlicer. 

On Mon, Dec 15, 2025 at 4:33 PM 3D Printing Tips and Tricks <3d-printing-...@googlegroups.com> wrote:

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[3D Printing Tips and Tricks]

If they're not two files overlapped, then I'd zoom in real close to see if hard to see facets were incorrectly assigned. It happens all the time.

[Murphy]

Will do, thanks for all the input. I’ll update w/ a picture once printed. 

To view this discussion visit https://groups.google.com/d/msgid/3d-printing-tips--tricks/836e2792-391b-46db-9763-96d7634cac97n%40googlegroups.com.

[Bryan Eckert]

It can be difficult seeing sometimes, you can change the filament colors to a color other than white that might help to see facets you’re missing.

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