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PrusaSlicer 3.x status  

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hyiger
(@hyiger)
Famed Member
PrusaSlicer 3.x status

I don't work for Prusa, just sharing from Prusa's github repo: https://github.com/prusa3d/PrusaSlicer/releases

PrusaSlicer 3.x status

Many of you know that we are working on a bigger release (PrusaSlicer 3.0.0), and you are probably eager to get your hands on it. We are sorry to keep you waiting and we admit that the work is taking longer than expected. There is massive amount of technical debt that we need to get rid of to allow future maintenance of the application. We are now fully focused on that, along with developing new features.

We are also sorry that we are not very active in our GitHub issue tracker lately - for the same reason. We plan to get back to it when the new slicer is released and make things right again. We hope that the work we are doing now will allow us to release more frequently in future and get back in touch with our community.

At this stage, we can confidently say that the 3.x groundwork is well in place and most features are ported. We are currently finalizing the UI and bugfixing. The time to release it now counts in weeks (although there may be more than four). The previous time estimates we worked with internally proved not very accurate, so we will rather not be more specific now.

Opublikowany : 23/04/2026 3:00 pm
3 ludzie polubili
shrap
(@shrap-2)
Estimable Member
RE: PrusaSlicer 3.x status

I hope they fix some really strange bugs I have been having with Prusa Slicer. Like my settings being overwritten and it becoming an unnamed file in the middle of my preparation. Or worse yet, the right click menu not working half the time.

Vehemently against AI. I've seen that film. It ends badly.

Opublikowany : 23/04/2026 6:01 pm
hyiger
(@hyiger)
Famed Member
Topic starter answered:
RE:

 

Posted by: @shrap-2

I hope they fix some really strange bugs I have been having with Prusa Slicer. Like my settings being overwritten and it becoming an unnamed file in the middle of my preparation. Or worse yet, the right click menu not working half the time.

On MacOS, right click is slow to bring up the context menu. I've been fixing these bugs on my own PrusaSlicer fork. The code is very convoluted. Hopefully Prusa has spent time on PrusaSlicer 3.x and cleaned it up. We shall see. 

Opublikowany : 23/04/2026 6:05 pm
Jürgen
(@jurgen-7)
Famed Member
RE: PrusaSlicer 3.x status
Posted by: @hyiger

The time to release it now counts in weeks (although there may be more than four).

That's a nice way of wording it. I have heard rumors that even numbers with multiple digits exist and have been used in counting. 😏  

Opublikowany : 23/04/2026 6:49 pm
shrap
(@shrap-2)
Estimable Member
RE: PrusaSlicer 3.x status

 

Posted by: @jurgen-7
Posted by: @hyiger

The time to release it now counts in weeks (although there may be more than four).

That's a nice way of wording it. I have heard rumors that even numbers with multiple digits exist and have been used in counting. 😏  

Soon(tm)

Vehemently against AI. I've seen that film. It ends badly.

Opublikowany : 24/04/2026 12:54 pm
Jürgen
(@jurgen-7)
Famed Member
RE: PrusaSlicer 3.x status

Real Soon Now, as Jerry Pournelle liked to put it.

Opublikowany : 24/04/2026 1:11 pm
vhubbard
(@vhubbard)
Reputable Member
RE: PrusaSlicer 3.x status

Technical debt is a new phrase for it.  When done correctly this can be a huge improvement.   Taking old quick code into well documented, planned and sustainable system code is a major benefit, but not quick.   I worked with a major software product that essentially went dark for a year.  No updates etc, as they went through removing "Technical Debt".    The result was amazing and soon spread to the rest of the company.  Ability to maintain the code long term reliably is a major competitive advantage.  Hopefully this is what is being done. 

Some views on Good Software.   It just takes discipline.   

Opublikowany : 26/04/2026 11:39 pm
1 ludzie polubili
hyiger
(@hyiger)
Famed Member
Topic starter answered:
RE:

Pretty much all modern slicers decend from 15 year old code. Would be interesting to see the source for PrusaSlicer 3.0 and what's changed behind the scenes. What's amusing is QIDI. Seems they ship three different slicers from three different pedigrees.  

Opublikowany : 27/04/2026 12:14 am
1 ludzie polubili
_KaszpiR_
(@_kaszpir_)
Noble Member
RE:

From the official discord from Tommy_Prusa3D:

 

Not much we are sharing about 3.0 while it's still
in a pretty volatile alpha state with large changes
happening with every release.

From the current version, I'm not aware of a 1 to 1
of the feature you are requesting, 
but I could easily see it working with some "hacks"
by making unique toolheads and assigning those.

That said, I would also stress that 3.0 is mostly
an update about improving things on the backend
and resolving some very long standing technical issues.

That allows for better feature implementation
in the future but doesn't front load the update
with a ton of new stuff.

See my GitHub and printables.com for some 3d stuff that you may like.

Opublikowany : 27/04/2026 7:54 am
Jürgen
(@jurgen-7)
Famed Member
RE: PrusaSlicer 3.x status
Posted by: @_kaszpir_

From the official discord from Tommy_Prusa3D:

 [...]  That said, I would also stress that 3.0 is mostly an update about improving things on the backend and resolving some very long standing technical issues.  [...]

That's disappointing. I was assuming PS 3.0 would also bring a major overhaul of the UI, and of multi-color/multi-material/multi-nozzle-size printing functionality.

Opublikowany : 27/04/2026 12:01 pm
shrap
(@shrap-2)
Estimable Member
RE: PrusaSlicer 3.x status

It would have to support Multi Color... I can't see why it wouldn't.

But then again, this is Prusa.... At this stage, if it turns on that's good enough.

Posted by: @jurgen-7
Posted by: @_kaszpir_

From the official discord from Tommy_Prusa3D:

 [...]  That said, I would also stress that 3.0 is mostly an update about improving things on the backend and resolving some very long standing technical issues.  [...]

That's disappointing. I was assuming PS 3.0 would also bring a major overhaul of the UI, and of multi-color/multi-material/multi-nozzle-size printing functionality.

 

Vehemently against AI. I've seen that film. It ends badly.

Opublikowany : 27/04/2026 12:59 pm
1 ludzie polubili
_KaszpiR_
(@_kaszpir_)
Noble Member
RE:

I assume it does already, they just had to do major refactoring and lib updates first, I know they were showing new UI but seems like after internal release they started to alter the UI as well, that's why they don't show anything because it just can change even more in the future - the UI is probably in some fast prototyping mode already.

Notice that the EasyPrint has slicer that supports multicoolor prints and underneath it uses prusa slicer via cli.

See my GitHub and printables.com for some 3d stuff that you may like.

Opublikowany : 27/04/2026 12:59 pm
hyiger
(@hyiger)
Famed Member
Topic starter answered:
RE: PrusaSlicer 3.x status

prusaslicer 2.9.x already supports multi-color so that won’t be an issue. Josef Prusa on X/twitter has implied that it will also support CMYK color blending 

Opublikowany : 27/04/2026 1:54 pm
1 ludzie polubili
Naugh
(@naugh)
Active Member
RE: PrusaSlicer 3.x status

I think what he means is using the full color spectrum through z-dithering, like Bambu Studio.

Opublikowany : 27/04/2026 6:13 pm
Naugh
(@naugh)
Active Member
RE: PrusaSlicer 3.x status

In fact, the Big Chief wrote this in X:

Hear me out:

1) C

2) M

3) Y

4) K

5) White

6) Giant roll of neutral infill material to save expensive colors

7) Support interface material

8) 😇

Opublikowany : 27/04/2026 6:16 pm
Naugh
(@naugh)
Active Member
RE: PrusaSlicer 3.x status
Posted by: @hyiger

prusaslicer 2.9.x already supports multi-color so that won’t be an issue. Josef Prusa on X/twitter has implied that it will also support CMYK color blending 

Oops, I'm late, sorry.

https://forum.prusa3d.com/forum/filament-materials-and-techniques/prusaslicer-full-spectrum/

 

Opublikowany : 27/04/2026 6:27 pm
T.Mundal
(@t-mundal)
Eminent Member
RE: PrusaSlicer 3.x status

From the INDX blog ( https://blog.prusa3d.com/prusa-core-one-indx-orders-now-open_134915/)

One More Thing (Coming Soon!)We have implemented full spectrum painting in EasyPrint, as well as a special semi-translucent CMY (Cyan, Magenta, Yellow, plus Black and White) Prusament set for perfect color mixing. That allows even the 4T INDX to do a wide range of colors in the same print, leaving more tools for different materials or nozzle sizes. We're discussing this with u/beybladetable and we would like to take this opportunity to thank everyone in the FullSpectrum community – it is super exciting to see! Specifically u/beybladetable, @ratdoux, @justin-rabh, @wombley, @huntercook, and others.

Opublikowany : 27/04/2026 7:35 pm
Jürgen
(@jurgen-7)
Famed Member
RE: PrusaSlicer 3.x status
Posted by: @t-mundal

We have implemented full spectrum painting in EasyPrint

But not in PrusaSlicer?

Opublikowany : 27/04/2026 7:39 pm
T.Mundal
(@t-mundal)
Eminent Member
RE: PrusaSlicer 3.x status

 

Posted by: @jurgen-7
Posted by: @t-mundal

We have implemented full spectrum painting in EasyPrint

But not in PrusaSlicer?

On the question about this under the blog

Tommy_Prusa3D CM says: That's the plan, but only at a later stage

Opublikowany : 27/04/2026 7:50 pm
1 ludzie polubili
Jürgen
(@jurgen-7)
Famed Member
RE: PrusaSlicer 3.x status
Posted by: @t-mundal  

On the question about this under the blog

Tommy_Prusa3D CM says: That's the plan, but only at a later stage

Thanks!

That's an unexpected choice of priorities. But maybe it makes sense: EasyPrint seems to target those users who want to make plastic trinkets (think articulated dragons) -- and who will benefit most from the newfound capability to make very colorful plastic trinkets.

Opublikowany : 27/04/2026 8:03 pm
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