The Renderfarm

1:43 AM

@TroyJamesSobotka I intentionally killed that tag, alpha-format is not needed. Please do not edit and add it back. BSE already has alpha-channel alpha and transparency tags.

meed96

Is this is the room where we complain about impossible rigid body sims?

David

@Gez please do not edit questions to include alpha-format.

@meed96 it can be

meed96

@David It is right now

David

@meed96 what is the trouble?

meed96

The horror of re-baking your simulation a hundred times, and every single time, your objects explode hundreds of miles away from the starting position

Rigid bodies feel so unstable in Blender. One minute they work, the next, they don't.

David

1:49 AM

make sure you have the scale, and rotation applied for all your objects.

meed96

I've definitely done that

Followed by setting the origin to geometry

David

and you make sure to always go back to 0 on the timeline, before running your next sim?

meed96

I bake each simulation before watching it, but yes.

Thing is, I get it working, and then it breaks. I'm on my 3rd backup file. Just going to have to go slower next time I suppose.

There's so many unknowns as well. I'm keeping all my objects on separate layers, and who knows how that's affecting it.

David

@meed96 and this is just a rigid body sim?

meed96

@David Plain old, full of squares n' cubes, rigid body sim.

David

1:53 AM

odd

meed96

Oh very very odd. Sometimes they explode into the air, then stop, and slide down an invisible wall. I check everything, make sure it's convex hull, try it as mesh, but nothing seems to be generating that invisible wall.

Very hit or miss.

David

@meed96 any hidden objects?

meed96

@David Didn't think of that, but no, no hidden objects.

I tried duplicating my stack of cubes and moving it to a different layer away from geometry, and it acted the same

Now stuff is randomly disappearing 2 frames in.

@David I'm very confused about Active vs Passive, perhaps you know the difference?

David

@meed96 I just checked, objects on other layers will affect the rigid body sim

meed96

@David Then what does the "Collision Groups" (bottom of Rigid Body Collisions tab) do?

It looks like a highlighter for which layers you want affecting your scene.

David

1:58 AM

@meed96 passive, will just sit there no matter what. Other rigid body objects will hit it. Active rigid body objects can move. it is that simple

meed96

But...but it isn't though. If I use "Active" and then uncleck Dynamic, then the object just sits there like a passive object.

David

@meed96 that is where you can specify what other objects the object will hit. (works the same as the game engine)

meed96

I've never used the game engine.

David

ok

then the rigid body will only interact with other objects on that same collision layer, has no connection to the regular layers.

meed96

Collision layers? Is that a game engine thing?

I've never heard of collision layers.

David

2:01 AM

@meed96 nope

those are what I'm talking about

meed96

@David That's the box, but I have no idea what they do.

David

I just told you

meed96

OHHHH

I get it now!

I was wondering where you went to set specific objects to specific layers, but I then realized that that was where you set them. Right.

David

open up a new file, have a passive plane, and two cubes both active rigid bodies. but set the collision layers different for the two cubes, it will fall right through.

meed96

@David Okay, so say for example I want an object in my simulation that doesn't do anything. I want objects to hit it, but I don't want it to move. Like a ground plane that you'd drop stuff onto.

What's the difference between setting that object to Passive, or to Active with Dynamic unchecked?

@gandalf3 I sense a disturbance in the force, as if a powerful master has appeared nearby.

gandalf3

2:08 AM

:P

David

@meed96 that is a good question, I dont know.

gandalf3

can haz lightsaber?

meed96

Only if it doesn't have tiny baby lightsabers coming out of the side of it.

gandalf3

4

Q: What is the difference between an Active animated rigid body and a Passive rigid body?

In the Rigid-body settings, there are two options, Active and Passive. My question is, What exactly does the Passive setting do? how is it different than Animated Active? (I know what Active and Passive are, just not what the difference between Active Animated and Passive Animated is) Thanks

physics

meed96

@gandalf3 Dug that question up while searching earlier

gandalf3

2:09 AM

^^ related

meed96

I didn't understand the answer

gandalf3

It's mostly a semantic difference

meed96

That literally just makes it more confusing.

But fortunately I'm not trying to keyframe anything in my scene

I just don't get the difference between Active with Dynamic unchecked and plain old Passive.

They seem to be the exact same thing

gandalf3

Not too sure about that

AFAIK the only difference is dynamic is animatable

meed96

In Andrew's tutorial on Rigid objects he made his ground plane passive, but he made his mid-air stationary chain link Active with dynamic unchecked. Not sure if you've seen that before.

gandalf3

2:13 AM

But you can't animate between passive and active types

meed96

No no, nothing like that.

I just look at animations that have characters interacting with simulations, like buildings being destroyed, and I can't get that to work in Blender.

Forget a character rig jumping through my building, can't even get the building to sit still on a flat ground :P

gandalf3

huh

meed96

I'm on my 4th attempt (file number 4), and this time I'm going REALLY slow....trying to see what exactly is causing my problems.

Because all my brain remembers is that it was working and then magically stopped working without me changing any settings.

gandalf3

Sounds like the rigid body sim all right

2

meed96

^ my life for the past hour

gandalf3

2:16 AM

XD

Is it possible you could upload your file?

I could take a look..

meed96

Well, so far it's still working....but as soon as it suddenly breaks I'll send it over.

So that's how you do italics

Is this how you do bold?

gandalf3

okay :)

meed96

Yup

Just exploded into midair

gandalf3

o.o That didn't take long

meed96

I took my massive chunk of terrain and set it to passive. Next timeline scrub made the blocks explode.

gandalf3

2:20 AM

scrubbing the timeline isn't guaranteed (or even really expected) to give correct results, unless the simulation is baked

meed96

Maybe I should go piece by piece, slowly setting all of them to passive....until I find the one.

I would be baking but as soon as you bake once you can't ever use the timeline again (at least not that I've found)

Then you have to bake every single time

gandalf3

@meed96 you can free the bake

The bake button should turn into a free bake button

meed96

@gandalf3 And then the bake decides it doesn't want to be free again

gandalf3

huh?

meed96

Freeing the bake doesn't do anything. It just keeps the frames in memory.

And refuses to over-write them with timeline playing

gandalf3

2:23 AM

Even if you toggle edit mode or change some settings?

meed96

@gandalf3 Scratch that, I was being a fool. You were right.

gandalf3

oh phew.. I was worried your rigid body sim might be more haunted than normal o.O

meed96

Some days of the week it is.

First piece changed from Convex to Mesh seems to have stopped the exploding....*for now*

Isn't Margin set to 0 like....not recommended?

gandalf3

yeees..

But sometimes needed

meed96

Hmmmmm.....

High margin isn't causing the gunpowder to go off for the moment...so at default it stays.

gandalf3

2:27 AM

/me is spooked due to having just typed 'margin: 0' into a css file right as you said that

meed96

I wish more than you think to understand code jokes....but I just don't :/

It's probably hilarious

CSS is like, webpages...so margin 0 seems like it would be okay :P

gandalf3

@meed96 Not really.. just a rather unlikely coincidence. or was it?

meed96

@gandalf3 Quickly, type in some code to make rigid body sims extremely stable.

The fate of my Blend file depends on your CSS code.

gandalf3

rm -rf /blender/extern/bullet2

There.

It's stable. It doesn't exist, but it's stable.

meed96

Changing convex to mesh seems to have worked again....

Quick question, why are small objects difficult for rigid bodies to handle? Isn't size just relative in 3D space?

There's infinite points between my two vertices, even if I make them closer.

Troy James Sobotka

2:31 AM

The problem is @David is that alpha-format specifically addresses the format. Please tell me where the other tags do the same. It is the wrong call.

gandalf3

@meed96 I think it's not so much size as the difference in size between two colliding objects

meed96

@gandalf3 But why can't the empire state building bump into a wineglass? ._.

gandalf3

It can if you have a big enough wineglass ;)

Of course a wineglass is one of those annoying concave shapes...

Troy James Sobotka

(Or better @David, ditch the other tags that are effectively echochamber of something nebulous.)

meed96

@gandalf3 Confused why my objects don't work with the Convex Hull setting....they aren't super complicated pieces of geometry

gandalf3

2:35 AM

@TroyJamesSobotka IMO it'd be better to have a tag like alpha-channel. I doubt there are too many questions specifically about the alpha format/type (maybe 4-5 atm?), but probably quite a number about some aspect of the alpha channel

@meed96 If you enter edit mode, select all, then run convex hull in the space menu you can see what the collision mesh ends up looking like

meed96

@gandalf3 MY EYES

That explains why my objects were sliding down an invisible slope

LOL....

Good grief running convex hull turns my objects into gross deformed masses of geometry.

gandalf3

yep

meed96

@gandalf3 That Christmas santa plane gif is really cool looking, that your work?

gandalf3

yes

meed96

Surprised you didn't at least make it to the finalists

gandalf3

2:46 AM

yeah.. :/

maybe next year

The winner was amazing though :O

Troy James Sobotka

@gandalf3 The problem is that prior to the answers, no one even realized it was a format issue.

@gandalf3 So of course there are no tags when 99.95% of the current readership doesn't even understand it is an issue.

See my point?

@gandalf3 I just randomly looked at about four posts last night and, sure enough, the issue is specifically related to the alpha format. That's just random search and find. I can only imagine there are more with existing incorrect answers or clarifications.

Gez

I agree with @Troy

Most of the questions regarding alpha channel are related to the confusion between its formats.

gandalf3

3:39 AM

@TroyJamesSobotka @Gez With that in mind, it might actually be more effective to have a more general tag. If users are asking questions because they are confused over premultiplied/straight, they likely won't know their issue is due to "alpha format"

Troy James Sobotka

gandalf3 I'm actually open to anything that makes it clear that it is about the type of alpha, not just generic "oh that's transparency" or some other inaccurate tag.

@gandalf3 that is...

gandalf3

Of course, other users would then add the tag.. But I can't imagine too many alpha-format questions besides "my alpha channel doesn't work as expected".

Perhaps it's just my limited imagination though. Do you have some examples of other questions specifically related to the type of alpha?

@troy_s I tend to agree that transparency is far too general

Grouping material transparency (seeing objects behind other objects) and image transparency (alpha) together is perhaps more confusing and not really helping organization

troy_s

gandalf3 until more folks get up to speed with how the formats differ, and how there is really only one-true-alpha, the tag won't get tagged.

@gandalf3 Exactly my point: We have three or four tags that are utterly meaningless really

gandalf3

It can go the other way too. Tags which are too specific only apply to a very small number of questions and hence don't help organization much either

troy_s

@gandalf3 Agree 100%. My gut says that a tag should have to do specifically with the answer as in what was the question getting wrong or had wrong or wasn't clear that made the solution possible?

gandalf3

4:31 AM

@troy_s My understanding has always been more tag the question, not the answer

Radish of Knowledge

5:09 AM

what does it mean when peopel call little kids "a ham???"

blenderartists.org/forum/member.php?60160-troy_s

Gwenn

6:26 AM

@GiantCowFilms This made me think of you :P

iKlsR

7:54 AM

@GiantCowFilms blender.stackexchange.com/a/44237/12 see comments

BookWyrm17

12:45 PM

Hooo boy, lots went on yesterday, huh?

What exactly did you want me to check out, @RadishofKnowledgeUntold? (man wish I could stick those together but I don't know if it'll not tag you... Lemme try this...

@RadishofKnowledge if that doesn't work

Gwenn

3:28 PM

4

The Egyptian god Anubis, for those who don't know ^^

HATMAN

3:42 PM

huh! Nice job!

Gwenn

:D

meed96

@Gwenn hand drawn? Or digital?

Gwenn

@meed96 Drawn by hand with colored pencils and graphite pencils. I still haven't gotten the hang of digital painting yet.

meed96

@Gwenn Nice. Can't draw at all myself.

Gwenn

@meed96 Also, hello and welcome to the Renderfarm. :D

meed96

3:51 PM

Thanks, been here before though, just not very often.

Gwenn

Ah, okay.

meed96

Complained to Gandalf for a half hour last night about rigid bodies. He was able to help me a bit though.

Radish of Knowledge

4:15 PM

@Gwenn pretty cool, but you did the nemes headress weird... :/.. so unless you were a egypt nerd (sorry) you wouldn't notice

but awesome art

@BookWyrm17 there was a link in the post too a minecraft version of blender on BN

BookWyrm17

ooh whaaatttt? Lemme find it again

im not seeing the link hmm

oh wait the yellow made the blue link seem black

GiantCowFilms

@Gwenn rofl

BookWyrm17

HOW have I never seen this thing before?!

It looks amazing!

wait what exactly does it do?

GiantCowFilms

@iKlsR can you super ping him here?

BookWyrm17

Um I've never used an addon before... how does this work exactly?
I'm so confused now... Still excited, but confused...

iKlsR

4:20 PM

@GiantCowFilms who?

GiantCowFilms

The guy who couldn't use BE

iKlsR

who?

oh

hmm

@hawkenfox Hey, can you let @GiantCowFilms know what errors you experienced when trying to upload. Thanks.

cheers

GiantCowFilms

@iKlsR thanks :D

@David BTW, why don't we have a simulation tag?

for generic simulation problems which are not attached to any particular method of simulation?

BookWyrm17

how do i use an addon someone please help i am so confused but this looks amazing....

GiantCowFilms

Ctrl-Alt-U

to open user preferences ... now is this addon installed?

BookWyrm17

4:27 PM

I found out how to install it, I think. Find the file and use the user preferences to install it. I just have no clue what to do with it now

Gwenn

@RadishofKnowledge Yeah, Egyptian mythology is not really my area of expertise. Also, the whole thing was originally just supposed to be a quick sketch before it turned into a longer project. Ah well.

BookWyrm17

what do addons DO, exactly? I thought they added some sort of build in rig to append and changed some settings up so its easier and stuff but I dunno...

iKlsR

@Gwenn should be lankier but looks great

> build in rig to append and changed some settings up so its easier

wut :)

@BookWyrm17 they allow you to extend the functionality of a piece of software basically

GiantCowFilms

@BookWyrm17 Depends on your addon. Also, did you enable it?

BookWyrm17

oooh..
So how do I use this one? do you use them all basically the same?
I checkmarked it...

GiantCowFilms

4:36 PM

Basically it does what it says it does in its documentation (if it has any)

if you are speaking about rigify, there should be something new in the add menu....?

BookWyrm17

ok... lemme seeee

iKlsR

@BookWyrm17 if you notice there are several categories, they all do specific stuff as you should be able to see in the description

BookWyrm17

I'm not seeing a README anywhere....
OK...

its this one here if that helps

github.com/TheDuckCow/MCprep/releases

Radish of Knowledge

@Gwenn it's still awesome...

BookWyrm17

@RadishofKnowledge do you happen to know what that addon did?

Radish of Knowledge

4:43 PM

@BookWyrm17 download this

github.com/TheDuckCow/MCprep/releases/download/2.1.2/…

@BookWyrm17 idk... something about creeps. i assumed it wiould make more sense if you did minecraft

Wait!!! wrong one

this:

github.com/TheDuckCow/MCprep/releases/download/2.1.3/…

BookWyrm17

:D Ok... I think its less about minecraft and more about cool stuff.. but I dunno I assumed it would have more send if you did blender

Radish of Knowledge

lol

okay.. just thpought it was something you'd be interested in

Added the Mob Spawner functionality! You can now with a click of a button spawn in a variety of included minecraft rigs, or install your own!
Now there are 25 Included rigs! Credits for the creators of these rigs are on the readme page
This slightly random assortment of rigs will be expanded very soon, and eventually will cover all mobs in the game! Some optimizations need to be made first.
No significant changes have been made to meshswapping or material prepping.

Added several more objects/groups for meshswapping both for jmc2obj and Mineways, including: bookshelves, some doors, crafting table, enchanting table (pre-aniamted), and more flora.
Added the license for the models, CC-BY. If you use the meshswap files, give credit by linking to this addon!
Changed the default meshswap exporter to none, forcing users to select the right one.
MeshSwap now will keep the same selection after running as before
Fixed meshswap offset function (part of Mineways function), objects should be placed in the right place now

BookWyrm17

Yeah thats what I thought... But I dunno how to get the rigs or anything :/

Radish of Knowledge

oh... well thats unfortunate.

MCprep Mob Spawner Update - Free addon for Minecraft Blender animations

►

BookWyrm17

whut

Radish of Knowledge

4:48 PM

hey! hats are gone.

(thank goodness)

BookWyrm17

heheh

one mo my youtube is acting up

does it say anything about how to get the rigs?

ahHA!
I found a new tab along the toolbar that lets me spawn stuff :D

Yaaay!

man now im getting errors

I thought this was supposed to be eaaasy :/

its "not a library" apparently. Do I have to find a different folder for where the stuff is?

It looks right...

David

5:49 PM

@GiantCowFilms where would you need that tag where rigid-body-simulation, smoke-simulation, fluid-simulation, cloth-simulation, ocean-simulation, physics or baking is not already sufficient?

@RadishofKnowledge why?

GiantCowFilms

@David when you know it needs to be simulated, but you aren't sure which simulation type.

physics is close, but doesn't quite cover it

David

is that likely? when do you not know if you want smoke, or an ocean?

GiantCowFilms

Yes, I wanted to edit it into a question just now

David

link please?

(I now wonder why I put a question mark on that last message.)

GiantCowFilms

lost it D:

Radish of Knowledge

7:19 PM

@BookWyrm17 idk really...

@David because they were stupid. :P

i need a spring about half the length of a pen spring but the same diameter... i don't know where to find one

David

@RadishofKnowledge them fighting words.

someonewithpc

@RadishofKnowledge No, they were not! :P I had a scarf, @David, if I recall, had a bathtub and gandalf3 had a Mayan temple; what's stupid about that?!

David

@someonewithpc thank you.

someonewithpc

@RadishofKnowledge Cut it?

@RadishofKnowledge eBay?

@RadishofKnowledge ebay.com/itm/…

Radish of Knowledge

8:52 PM

i hate ebay

someonewithpc

@RadishofKnowledge Why?

Radish of Knowledge

because it's unpredictable

someonewithpc

It'd the only place I buy from

Radish of Knowledge

does portugal have home depot?

someonewithpc

Tough, mostly because Amazon doesn't ship many things here

@RadishofKnowledge ?

Radish of Knowledge

8:54 PM

Home Depot

they sell hardware and building material

@someonewithpc oh.

i couldn't find them on amazon

someonewithpc

@RadishofKnowledge There a reason I put a question mark there..

Radish of Knowledge

@someonewithpc thats a no then...

what about Radio Shack?

someonewithpc

@RadishofKnowledge Not that one, I don't think

But there are others, of course

@RadishofKnowledge No

Radish of Knowledge

Lowes?

i'll bet i could get springs at hobby store...

someonewithpc

@RadishofKnowledge Dude, it's a different country, from across the ocean

Radish of Knowledge

8:56 PM

hobbytown USA, Hobby lobby...

@someonewithpc Aliens!!!

i was just checking...

what hardware stores do you have?

someonewithpc

@RadishofKnowledge Hardware not in the electronic sense, I suppose?

Radish of Knowledge

you may not understand, but a place without home depot just seems impossible. :D

@someonewithpc yes, not

someonewithpc

@RadishofKnowledge I think I do

Radish of Knowledge

you have to have walmart, right?

someonewithpc

Aki (misspell of 'aqui', meaning here), for one

@RadishofKnowledge Big ocean!

Radish of Knowledge

8:59 PM

No walmart????!?!?!?!?!

someonewithpc

@RadishofKnowledge Maxmat

Radish of Knowledge

NO WALMART!?!??!??!

even new zealand has walmart

and i think south africa did too, but i can't remember

someonewithpc

@RadishofKnowledge The one with the fat people, no :P

Radish of Knowledge

???

i live in colorado... no fat people here

is that the opinion? americans are fat? lol

someonewithpc

@RadishofKnowledge That too :P But I meant Wallmart

Don't they have scooters for fat people, or something?

Nothing like that here

Radish of Knowledge

9:04 PM

@someonewithpc no, they don't... where'd you hear that? XD

someonewithpc

@RadishofKnowledge Do a google search for "Wallmart people"

Radish of Knowledge

they have wheelchair\carts for cripples

someonewithpc

Actually, better if you don't

Radish of Knowledge

@someonewithpc lol

@someonewithpc wasn't going to

someonewithpc

@RadishofKnowledge Here

Radish of Knowledge

9:06 PM

whoa

someonewithpc

@RadishofKnowledge isitnormal.com/story/fat-people-riding-scooters-1306

Radish of Knowledge

9:33 PM

yeah, thats not normal... never evenseen anyone besides cripples using them, and i've never seen anyone that fat

someonewithpc

Well, maybe not where you live...

Apparently, 8Million vertices is a bit too much :P

(Just a suzzane whit a block remesh modifier turned up to eleven)

Radish of Knowledge

10:14 PM

the only place that would have people that fat would be wisconsin... i've been to almost every state at this point, and wisconsin is the fattest

HATMAN

11:08 PM

What's up doc?

TARDIS Maker

11:46 PM

Cinematic Film Look on a Budget

►

Best DSLR Guide in a long time

Transcript for