This Is Huge: Lightning infill AND Arachne in PrusaSlicer 2.5 Alpha, and more...

What's NEW in Prusaslicer 2.5.0 Alpha? Well why don't you watch and find out! Four big things are new, so you won't want to miss out on this release, in my opinion.

Please consider supporting the channel to allow me to make more of the content I want to (like this):

Credits - models used! (did I forget one? tell me!)
Agepbiz' amazing toy models (they have eggs!):
Makkuro's WORKING print in place canon (I'll show it working later):

Any questions? Please ask.

You want affiliate links? Sure.
Eryone are making some really cool filament right now, and it's good IMO:
Biqu / Bigtreetech stuff? Have you seen that new Manta board? The compute module?

[timschafer]

A deep dive into Arachne and slicing/ toolpath generation would be great.

[remcoburema]

Hi! I'm one of the original implementers of Lightning (in Cura) -- also helped implementing Arachne as part of the Cura team :-) I was surprised as well, as they previously said it would not be added, at least not anytime soon. However ...

How they (Prusa) could do it (Arachne/Lightning) so quickly? Not a big secret: As they say in the release notes, most of the code was directly ported from Cura. -- That's why we're thanked/referred to so often in these particular release notes. Since our engine is C++, both of the files implementing these features where reasonably modular, and their entire code-base is also C++, it was ... a lot more possible (still not _easy_ of course, I don't want to imply that they just had to press a button or something) for them to do such a thing.

Although this is a bit bigger than we're used to, this sort of thing goes back and forth in both directions. Remember the changed 'arrange on buildplate' functionality in Cura a good while back? We used the library that one of their devs made for it. We had to ask them to change the license though, which they did, in exchange for a better adherence to the 3MF-standard in Cura (something about the way we saved 3MF files must've annoyed their devs to no end) -- and a shout-out, which you can still see a remnant of in the Cura 'about' screen.

[Jnny_]

Regarding the terminology of "What would you call an alpha if not released" the correct terminology would be that it has been published.
Published software has normally 4 Stages: Alpha (features will be added), Beta (Fixing Bugs), Release Candidate (RC) (Might be a final Release) and the Release itself.

[eraldylli]

All that is very promising. Let's hope possible kinks are ironed out and they become standard features soon. Great job.

[tvathome]

deep dive on slicing engines would be welcome I haven't seen anyone really cover it apart from collision avoidance .

[truegret]

Go for it! Take a deep dive (as others have commented) into Arachne, please. It helps with the strategy, for me anyway, in determining the "best" orientation to print - producing a print with the absolute least amount of post-processing, shell count, layer height. Thanks! I have been using 2.4.1 for some time and really like it.

[DarrenGerbrandt]

Saw it a week or so ago and had to try it out. Printed a stamp I made for my wife for the soap bars she makes for her business, the lettering came out the best I have yet seen with any slicer. Will definitely be trying it out more in the coming weeks, so far the results are great even for an alpha.

[Rebar_real]

For tpu/e I wonder if just adding a basic pause during fussy parts, I said Fussy, would calm down any pressure build up. Nice they're taking everything into consideration.

Lightning sounds better than inward sneeze at least.

[carpenecopinum]

Great overview video!

One thing I'd love for infill is some kind of "double lightning" infill, because I really like the general idea, but I had lightning infill fail a lot before, because in a big print it generates large "flaps" that are only attached at one side, so they are really prone to bending away and/or warping upwards and then the nozzle running into them even with moderate z-hop. So it would be great if we could have infill that has the same advantage of mostly supporting only regions where support is necessary, but also considers the stability of the infill structure by connecting every line to some other point on the contour of the layer.

[nikoraasu]

You are slowly becoming my favourite channel with quick news or tips about 3D printing

[hermangaviria]

Lets pressure the Cura devs to get paint on supports added.

[dtibor]

Flexible materials like tpu can be printed nicely at absolutely constant lower speed (15-30mm/s) and with high acceleration(over 1200mm/s²) and moderate cornering/jerk(over 10mm/s) and no S-curve. Retract 7-10mm. Works with any slicer, roboust results.

[marijnvandongen]

"It fundamentally bothers to try to draw them" cracked me the fuck up 1:36

[imqqmi]

About those seams, I've always wondered why they don't implement a way to to not stop the xy motion when changing layers. A ramp would allow the print head continue moving and keep the pressure equal, ie no squeeze out on the seams and no retraction. This only needs to be done on the outer perimeter.
In subtractive cam it's also used, ie in fusion 360 and vcarve it has options to ramp down or spiral down into the next pass.

[TheMikolasZuza]

You seem to be reading every comment like a proper YouTube maniac (not at all speaking from experience).
That was very nice! At Prusa, I tend to wait with the feature overview video till the final release is ready (for many obvious reasons). But I really appreciate you covering the alpha so soon after release. I need to find a good place on the web or in the documentation (I wrote the whole thing, humble brag :D) for 3rd party videos about PrusaSlicer, this would be an excellent addition to it.

[GEHDunedin]

Definitely waiting for tree supports - the only reason I'm still holding on to Cura at present rather than switching to PrusaSlicer full time

[amtdlabs]

Nice update!!! I hope Superslicer updates soon… I like the “only one perimeter” in bottom and top !!! Gives a nice finish mainly in the first layer if it is cosmetic!! Can’t find this option in another slicers!!!

[DarkStorm]

Really looking forward to these making there way over to Superslicer.

[wolffin]

Love these videos, definitely love the lighting infill in my cura, glad to see it in prusa, looking forward to prusa 🌳 🌲 🌴 support 😀 👍 oh yeah definitely gonna try it out 🤪💯👍👍

[henrymach]

One thing I'd really like to see implemented was an option to always keep movement in the same direction when extruding perimeters through all the piece. I mean, if you start clockwise, only do clockwise. If you start counterclockwise always do counterclockwise. Never mixing