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Cake day: June 12th, 2023

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  • Fillets are easier to print horizontally than chamfers as they spread the acceleration (i.e. the thing that makes sharp corners bad) over the while fillet instead of just splitting it into two stages like a chamfer would.

    Chamfers are easier to print vertically than fillets as the overhang is limited and consistent.

    There’s no overhang for a horizontal corner as you’re printing the same shape onto the layer below, and no acceleration for a vertical corner as it’s entirely separate layers so the toolhead never has to follow the path of the corner.

    It sounds like you’ve read (or only remembered) half a rule. It’s not the case that either half of the rule is used the majority of the time because 3D printers are used to print 3D objects, so they always produce objects with both horizontal and vertical edges.


  • It’s not so much about time (although I have played a couple of things that would take a ridiculously long time to save or load), it’s about the number of chances to make a mistake. If you only save ten values, it’s really easy for a programmer to verify that they’ve got everything right, but if they save ten million, there are a million times more opportunities for mistakes to sneak in and it’s much harder to notice each mistake, let alone fix it.

    Fallout 4 is a bit of an odd duck here as the save format for the BGS games is basically just another ESM file, so reuses all the same serialisation and deserialisation mechanisms. Most games don’t have multiple places the game data can come from and a way to combine them as they’ve not got an engine designed with this kind of modding in mind, so there’s nothing to reuse in this way for saves. Given the general standards of engineering from that studio, if they didn’t have this as a core feature of their custom engine for nearly three decades, and instead had to come up with something from scratch, they’d absolutely mess it up or have to simplify the saving system.


  • I’ve never actually needed primer to paint PLA unless the paint I was using was terrible, and wouldn’t have stuck to the primer very well, either. Tamiya’s acrylics have been entirely issue-free for me, both with a brush, or thinned and airbrushed, and they’re not that expensive, but I’ve also had acceptable results with random fifteen-year-old tubes of really cheap acrylics that were sold more as a children’s toy than a serious paint (although a lot of these tubes had gone bad in that time) and with Humbrol and Revel acrylics and enamels (although their acrylics come in pots that don’t seal very well, so it’s not that uncommon for them to be already cured when you first open them - if you’re buying liquid acrylics for model painting, Tamiya is a better choice).




  • Usually, having to wrangle a junior developer takes a senior more time than doing the junior’s job themselves. The problem grows the more juniors they’re responsible for, so having LLMs stimulate a fleet of junior developers will be a massive time sink and not faster than doing everything themselves. With real juniors, though, this can still be worthwhile, as eventually they’ll learn, and then require much less supervision and become a net positive. LLMs do not learn once they’re deployed, though, so the only way they get better is if a cleverer model is created that can stimulate a mid-level developer, and so far, the diminishing returns of progressively larger and larger models makes it seem pretty likely that something based on LLMs won’t be enough.


  • Enzymes are specific to a particular molecule, or class of molecules with a particular pattern. A PEI buildplate is not getting eaten by the proteases in a dishwasher tablet. The reasons you’re not supposed to rinse things before putting them in the dishwasher are:

    • most dishwashers have sensors to detect how much material is ending up in the water, and if things have been rinsed, it can mislead them into thinking the load is lighter than it really is.
    • dishwashers replace some of the dirty water part way through the load, and the enzymes are more soluble than the dirt, so if there’s not much food residue for them to stick to, they can end up getting rinsed away part way through the cycle.
    • it uses water and your time to rinse the dishes first, which is a waste if it doesn’t make them end up any cleaner.

  • AnyOldName3@lemmy.worldto3DPrinting@lemmy.worldResin printing in the cold
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    24 days ago

    I think it was pretty reasonable of them to worry - lots of people who don’t like spending unnecessary money also don’t like spending not-obviously-necessary money on safety equipment, and there’s plenty of material on the internet that would imply resin printing is completely safe as long as you don’t drink the stuff. Resin printing with woefully inadequate ventilation/PPE is really common, so it’s a pretty safe bet that anyone asking questions is probably also doing something unsafe without realising it, especially as resin not liking the cold is something a lot of people learn about fairly early on (unless they live somewhere where it never gets below 20°C).



  • CUDA is an Nvidia technology and they’ve gone out of their way to make it difficult for a competitor to come up with a compatible implementation. With cross-vendor alternatives like OpenCL and compute shaders, they’ve not put resources into achieving performance parity, so if you write something in both CUDA and OpenCL, and run them both on an Nvidia card, the CUDA-based implementation will go way faster. Most projects prioritise the need to go fast above the need to work on hardware from more than one vendor. Fifteen years ago, an OpenCL-based compute application would run faster on an AMD card than a CUDA-based one would run on an Nvidia card, even if the Nvidia card was a chunk faster in gaming, so it’s not that CUDA’s inherently loads faster. That didn’t give AMD a huge advantage in market share as not very much was going on that cared significantly about GPU compute.

    Also, Nvidia have put a lot of resources over the last fifteen years into adding CUDA support to other people’s projects, so when things did start springing up that needed GPU compute, a lot of them already worked on Nvidia cards.



  • I’ve found this is really dependent on placement. If I put my libre a couple of centimeters away from the region I usually use, it’ll read low all night, but as long as I stick to the zone I’ve determined to be fine, it’ll agree with a blood test even if I’ve had pressure on it for ages. Also, the 3 is more forgiving than the 1 or 2 because it’s smaller than the older models, so affects how much the skin bends and squishes less.






  • I think you might have misjudged when LCDs became common as by the end of 2004, when Halo 2 released, LCD TVs were already a reasonable fraction of new TV sales, and in parts of the world, it was only a few months later that LCD TVs became the majority. For PC monitors, the switch came earlier, so it was clear CRTs were on the way out while the game was being developed. If they hadn’t expected a significant number of players to use an LCD and tweaked the game as much as necessary to ensure that was fine, it would have been foolish


  • That’s what’s keeping the lights on. If they sunk the extra billions into making their discrete cards genuinely superior to Nvidia’s (which already means taking it for granted that selling comparable products for less money makes them knockoff rather than superior), then Nvidia could stop them recouping the development costs by eating into their own margins to drop their prices. Over the last decade or two, ATi/AMD’s big gambles have mostly not paid off, whereas Nvidia’s have, so AMD can’t afford to take big risks, and the semi-custom part of the business is huge long-term orders that mean guaranteed profit.


  • I’ve printed kilos and kilos of Geeetech PLA, and that’s some of the cheapest on AliExpress (although I used to get it directly from their website before I realised doing that was normally more expensive). It arrives wet, but other than that, there’s (nearly) nothing to complain about (although years ago, I had a roll with two lumps of grit in it that caused clogs). I’ve had mixed success with their other materials - their ABS+ started burning in the nozzle while still being cold enough that layer adhesion was bad and their high-speed PLA has ridiculous oozing that causes ridiculous stringing, but their PETG and TPU seem fine. I’m pretty confident that their basic materials are absolutely worth £7/kg.