- research/nimso-project-tx.md: chronological per-video notes 2017-2026, topic synthesis, VR Messs scope, proportions & calibration (Winter/Drillis-Contini/Dempster tables verified), open unknowns - research/sources/nimso-transcripts/: yt-dlp auto-caption transcripts + dated index (re-pullable) - research/vr-physics-rig-hexabody.md: BIMOS/HexaBody/Boneworks reference, Box3D native joint mapping (spherical/motor/prismatic/distance), superseded-as-target note - AGENTS/HANDOFF research pointers Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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# Half Life: Alyx - Do we need arms? - Made in ProjectTX (PSOV2vX5MrM, 430s)
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it's me nem Soni welcome back to another yard video today's video is just a little bit of a quick short video to do with the little debate that's been going around on I think Twitter will about hands and ohms in VR obviously with half-life Alex coming out the trailer showed that the that valve have gone with the idea of only hands twitch to a certain extent I understand because obviously when it comes to the actual tracking the only tracking we have is the two hands by default where this off standard setup is the two hands and of course the head tracking as well now obviously the discussion is about visuals pretty much all the time and myself I have another point to make on the subject so I just wanted to make a very quick video this video is obviously not going to release this demo I'm working on it hopefully a new system will be up and ready very soon but until then I just wanted to talk about this subject here the idea of having arms obviously is just a visual aid in normal games however with the with the half-life Onix kitten I've noticed that it seems to be physics based hands which of course is the same as my system and a few other systems out there we're in the character's hands are actually physically there so you can sort of move objects around pick them up like that and then you know you've got a sort of an actual physical hold on those objects with physics hands there's a difference because arms are no longer just a visual aid to realistic motion or realistic looking hands now they actually have an impact as you can see like an elbow things around with the elbow and that makes an actual impact enough that I actually noticed it would have affected the trailer itself is a very short moment about a couple of frames or so just when the character is going like this and and moving things out before he grabs the thing at the back or should I say she or whoever's playing just before that just after that happens there's a little toothpaste or maybe it's just a cube of some sort of other thing which they actually go behind that booth base they go like this they put the hand behind it and the wrist is right here wrist is right here sort of pushing that proof best would have fallen off the table if they had arms so it actually has a detectable impact on the actual way the character moves and and the interactions with the world you see if I didn't have elbows I'd be able to just go right there however with elbows there you go forearms are quite important and that's actually something that I've mentioned before in another physically do not this one here not with this project but with the hybrid test chamber project with that project the problem was that I did have physics based hands for a while but I actually added four arms in that project and the reason for that is because of what I've shown here now that project didn't have physics body as well which this one of course does so what I'm doing here is a little bit different because here it actually impacts the character movement as well now this isn't something that I've noticed in half-life Alex I don't believe that's the case which would make sense anyway because for new users this can be a little bit more difficult and make it make it more of a difficulty to actually get used to VR so for that I understand I wouldn't want to put new users to VR straight into something like this or something like some of the others that are doing this system as well but you can see straight away I went to sleep a little bit too early you can see when I actually climbed this that my elbows and my arms actually have an impact on my motion as well you can see yeah and completely relaxed my hands I can sort of open and close them but you can see I'm still hanging on the Lada very very cool and of course when climbing it makes a massive difference when you're clambering up a Ledge they can see here you can see I'm actually using my elbows to to actually climb as well it makes a massive difference on things like that and of course on something as simple as picking up a box source or something like that let me just go get a small box which I believe there's one over here or is it yeah there we go now obviously I can pick the boxes up with my hands here but of course one of the problems with that is it's purely a grab point whereas here you can because it's a physics based system you can actually pick them up via pressure as you can see and as a result having arms it does impact that as well you can sort of hold things with two arms you see oh that was useful let's just hook this one you can see how it actually impacts the the holding of an object here for example I should be able to pressure grab this like such there we go I've been able to pressure grab it to my body without actually physically holding on so yeah there you go having four arms with a physics based system physics based hands does have an impact it does change the way you move for example like this pin yeah see you can see the beam flips over because I didn't dip my hand in properly if I don't dip my hand in the hole Ben just flips over and then that happens so yeah having arms does make a difference to the actual gameplay in this case maybe not so much as it would here but in half-life Alex it will have an impact on how you move your arms and grab things that's my point I don't actually mind the floating hands visuals there's no problem with that because it doesn't have any impact on the gameplay but having forearms on a physics based system is quite necessary and I did saw in my test chamber where only the forearms were actually there there was no full arm there was no body it was just the forearms and the hands and I believe it it makes a massive difference in the way you grab things thanks very much for watching and that's this video a little quick short quick short video hopefully I'll get one more done before I'm off to Germany thanks very much for watching goodbye
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