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How to Make Realistic Fire & Smoke in Roblox Studio — Transcript

by Ice Guy · 2,809 words · 382 segments · language en · Watch on YouTube

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0:00This is how you can make realistic fire
0:02and smoke in Roblox Studio using
0:04particles. Let's begin. Okay, let's
0:06begin with how to actually make
0:08realistic particle effects. So, all you
0:10really need is a flip book texture like
0:13this. Now, you can find this in the
0:15toolbox or you can find it online. I've
0:17compiled a decent amount of textures
0:19that I'll be linking below in a model.
0:21Now, flip books can be any size. It can
0:23be 8x8. It can be I think this is 16x4.
0:27So, it can really be any size, but the
0:29more pictures, the higher the frame rate
0:31will be, but the texture quality will be
0:33lower because the more pictures take up
0:35more space on the texture. It's
0:37important to find a nice balance so you
0:38don't get really pixelated textures.
0:40Now, let's just begin with the basic
0:42settings you'll find. You can add a
0:44particle emitter into a part or just
0:47into an attachment. If you put in an
0:49attachment, it will be only in that
0:51center point. It will emit perfectly in
0:53the middle there. But if you add it on a
0:55part, you can scale the part and it will
0:58distribute it randomly around that as
1:00you can see here. Now for the particle
1:02emitter, just go here, particle emitter,
1:04and apply it. You want to import your
1:06flip book into the texture property. And
1:09then you want to go down here and enable
1:11the flip book and set it to however much
1:13the grid is. This one's a 4x4, so I'll
1:16set it to grid 4x4. And the flip book
1:18frame rate, you want it to be as many
1:20pictures as you have. So 4x4 would have
1:2316 frames. So I set this to 16. If you
1:26decrease this, the frame rate will be
1:28slower and the image will be slower. So
1:30if you want a really jittery looking
1:32flip book, that works. Then if you
1:35increase it, it will just play it
1:36faster. This will result in a smoother
1:38looking image and a faster looking one.
1:40So use that for certain instances. Now
1:42for the flip book modes, loop just means
1:45that it will loop. Oneshot means
1:48something. I don't know. Ping pong means
1:49it goes back and forth. As you can see
1:52here, goes forward, then it reverses it.
1:54And random just means it'll randomly go
1:56through the frames instead of just going
1:58in order. So, you know, I would just
2:00recommend having it on loop for most of
2:02these effects. Now, flip book start
2:04random just means it'll start on a
2:05random frame. If you have a flip book
2:07that loops perfectly, then I would
2:08recommend using this to add some
2:10variety. But if it doesn't loop
2:11properly, then it will have a little bit
2:13of jitter to it, which doesn't really
2:15look that good. Okay. Now, light
2:16emission changes how the particle looks,
2:19but doesn't actually cast out any light.
2:21So, for fire, I just recommend having
2:23this pretty high. Something like 7 to
2:25one works pretty well. Now, brightness,
2:28just how bright the texture looks. You
2:29can add in a custom color here. Just
2:32change the hue of it. Now, the light
2:34influence affects how light influences
2:36[music] it. If you set the light
2:37influence to one, however, the
2:39brightness will go away. So, just be
2:40cautious of that. So if you have a point
2:42light or you want to make fog, then I
2:44would recommend increasing the light
2:46influence. Now the orientation just
2:48affects how the particle is orientated.
2:50So facing camera world up changes the
2:52rotation so it always faces the camera.
2:54But if you look at it from the top,
2:56it'll always just be pointed up. But
2:58facing camera just means it'll always
3:00face the camera. I would just recommend
3:01having the orientation set to facing
3:03camera or facing camera world up. Now
3:05the size is where you can affect the
3:08size of the particle. Now, you can just
3:10set a number value here if you want. Set
3:12to one or three or something. There's no
3:15limit to these. You can set it to like
3:162,00. It'll just be massive. But if you
3:19click on these three little dots right
3:21here, you get this menu. Now, on this
3:24side is how it begins. So, if you set it
3:26to zero, it will scale out. This is
3:28where it ends. And this is everywhere in
3:30between. So, you could make it at zero
3:33for the start and at the end. Then you
3:35can drag in another key frame so it
3:38increases in size. and then decreases in
3:40size at the end. So you get this effect.
3:42Set all of these. [music] Now for the
3:44envelope, this is how much randomness it
3:46will be. So if you set the envelope to
3:48one and the value to two, the result
3:50could be either three or one and
3:52anywhere in between that because it's a
3:54random value. Now you can quickly do
3:56that just by holding this little bar
3:59here. Just increase or decreases that.
4:01So adding some randomness through the
4:03envelope can create nice variation from
4:05the texture. Now the squash is just how
4:08compressed or squashed the texture will
4:10look. You set this to two, you can see
4:12it's pretty pretty squished. You set
4:14this to -2, it'll flatten. So yeah, now
4:18the transparency is similar to the size
4:20value. You can set this to like a number
4:22or you can click on these three dots and
4:24just change the values to how you want
4:27it to look. Bringing it to one will make
4:29it fully transparent so you can't see
4:30through it. Setting it to zero will be
4:32fully opaque. So if you don't have an
4:34animation that loops properly, I would
4:36recommend just making it increase in
4:38transparency at the end and at the start
4:41so it just blends together a little bit
4:42more nicely. Now we'll get into the Z
4:45offset later because right now it's not
4:46applicable. Now the emission direction
4:49just changes in which way the particle
4:51will be distributed, but since it's just
4:53a thin little part like this, it doesn't
4:55really matter. Now lifetime is how long
4:57the particle will stay. So you set this
5:00to three. Let me just increase the size.
5:02it will stay three times as long. So if
5:04each loop is 1 second, this will stay
5:06for three seconds. Now if you increase
5:08the rate, this increases how often new
5:10particles will be emitted. The rotation,
5:13you can set a minimum and a maximum
5:15value. This just changes how the
5:17particles will be emitted, whether they
5:19have a random rotation. So if you just
5:21set this to like -30 and 30, you'll see
5:23that the textures will start having a
5:25random little tilt to them. Rotation
5:27speed affects the rotation throughout
5:29the animation. So you can see it turn a
5:32little bit as it plays. As you can see,
5:34they're turning now. Now speed affects
5:36how the particle will move. So if you
5:38set this to couple random values, now
5:40it's being distributed up. Set it to 30
5:43and have some really fast ones and have
5:45the minimum at one. So there's really
5:46slow ones. Now the spread angle
5:48determines the angles at which particles
5:50may be randomly emitted measured in
5:52degrees, obviously. Now for the emitter
5:54shape. If the emitter shapes a box, then
5:56it will be emitted in a box-like shape.
5:58If the emitter is a cylinder, it will be
6:00emitted in a more cylindrical shape or
6:02something. I don't know. It's like a
6:04disc, it'll be emitted in a circular
6:06shape. If it's a sphere, then it will be
6:08emitted outwards in every direction. I
6:11would recommend just keeping this as a
6:12box. [music] The shape in and out.
6:14Outward means it will go up. Inward
6:16means it will go down. In and out means
6:18it will go up and down at the same time.
6:20For acceleration, this affects how the
6:23particle moves further into its
6:24animation. So to 30, we'll start slow
6:27and then speed up. So this can be used
6:29to create nice little smoke trails like
6:32something like that. Just goes up and
6:34then slightly moves. Now for these
6:36properties, I don't really use them that
6:38much, but drag determines the rate at
6:40which particles will lose half their
6:42speed through exponential decay. If you
6:44have lock toart disabled, and if you
6:46move it, the particles will respawn
6:48slowly and won't stick to the part. But
6:50if you enable locked to part, then when
6:52you drag it, it will stick to it. That's
6:54good for things. Now, time scale affects
6:57how fast the animation plays. So, if you
6:59set this to half, you'll see it plays
7:02really slowly. But if you set it to one,
7:04everything plays faster. Now, wind
7:07effects drag is good if you want to use
7:09the global wind value to affect how your
7:12particles work. So, you can just go into
7:14wind and then [music] just change how
7:16this works. So, that's a quick little
7:18rundown on all the properties. Now, this
7:20is how you actually create these
7:21effects. Hey, did you know that not even
7:235% of people who watch subscribe? So, if
7:25you found this video genuinely helpful,
7:27then it would mean a lot if you could
7:28help the channel grow. Back to the
7:30video. Let's start with fog. Now, to
7:32create a fog like effect like this, just
7:34quick little weird looking volutric. It
7:36looks better at night. You can see that
7:38these lights affect the fog. So, the way
7:42you do this is just create a large
7:44little plane. Add a particle emitter.
7:46Make the size really big. You can create
7:48a curve like this. And then set the
7:50transparency to very high, fading out at
7:53the beginning and the end. This way you
7:54can see through the fog a little bit. To
7:57get really dense fog, you want to
7:58increase the lifetime a lot and increase
8:00the rate a lot. Now, this will probably
8:02cause a bit of lag if you have a massive
8:04scene with this. Then you want to set a
8:05random rotation. Make sure it rotates a
8:07little bit and add just a little bit of
8:09speed so it spreads out a little bit.
8:11Now, for this effect, if you want like a
8:13foggy little scene, you do most of the
8:15things you did with this one, but just
8:16decrease the transparency even more. So
8:19that's pretty cool. Now, if you wanted
8:20something like this, something like
8:23this. Now, the downside of using
8:25particles is that it can take a while to
8:26get to its full effect. So, just be
8:28aware of that. But if you want these
8:30clouds like effect, what you can do is
8:32just have a whole lot of volume
8:34surrounding the main scene, but not
8:36actually over it, just around it. And do
8:39the same thing you did with this area
8:41right here, just on a larger scale. You
8:43want to increase the size of these to be
8:45massive. Then yeah, you can also add in
8:47these little point lights. This just
8:49creates a nice little lighting effect.
8:51Just add some more depth to the scene.
8:53And yeah. Okay. Now to create these nice
8:55little fire and explosion effects. Basic
8:58principle. It's basically just having a
9:00lot of the same effect with a little bit
9:02of speed, a little bit of acceleration,
9:04and have it fade out. So for this one,
9:06these are the settings I used. You want
9:08to start a little smaller and get a
9:10little bit larger at the end. You want a
9:11lot of variation between the points.
9:13Same thing for transparency. You want to
9:15start completely transparent and make it
9:17visible, then make it fade out at the
9:19end as if it was smoke. I'm going to
9:21move on from this since it's not
9:22amazing. Move on to this one. This one's
9:26five effect stacked together. That's how
9:28you create really nice looking
9:30combinations. Now, it starts with a
9:32small layer. This one is just a layer of
9:35fire like this. Doesn't need to be that
9:38dense. Then it's a a beginning explosion
9:41effect. Then it's another explosion
9:43effect at the top just to create a
9:45little transition. And then it's a smoke
9:48trail at the very end. Just have it
9:50slowly fade out. Okay. Now,
9:53specifically, these are the effects I
9:55used for this bottom one. Just have the
9:58size massive, but have a slight
10:00variation. Have the transparency fade
10:03out as it gets towards the end of the
10:05animation. Just increase the rate a lot
10:06so there's a lot of explosions, but make
10:08sure the lifetime set at one so it
10:10doesn't loop multiple times. and just
10:12add a slight little amount of Y
10:14acceleration so it goes up a little bit.
10:16Add a little bit of X variation and Z
10:18variation if you want it to head a
10:20certain direction. Now, I would
10:21recommend decreasing the time scale of
10:23all these animations because they play
10:25just too fast. Normally, if you decrease
10:27that, it'll look like a smaller fire or
10:30larger fire. Now, for the second one,
10:32it's basically the same thing. You just
10:34want the size to be pretty high. You
10:37want the transparency to fade out. And
10:39it's basically the same principle just
10:41with a different texture and slightly
10:42higher. Then you want the fog. The fog
10:44works slightly different. It's not an
10:46actual fire texture, so it doesn't need
10:48any light emission. The size, you want
10:50it to be massive. Transparency, you want
10:52it to fade out, too. I personally like
10:55having the fog more transparent than
10:56these other textures, so it sits at the
10:58back more. Then increase the
11:00acceleration more. And since this will
11:02be smoke, you want to increase the
11:03lifetime to have a minimum of one and a
11:05maximum of three. The higher the
11:07lifetime, the further out it will trail,
11:10but you can create these weird little
11:12gaps that don't look too great in my
11:13opinion. Increase the rate a lot and all
11:15of that stuff. Now, a nice little trick
11:17you could do is adding a little light at
11:20the bottom. This just causes this
11:23effect, which I think looks better. It
11:24looks more lit up, like the fire is
11:26actually causing some light. I think it
11:28just looks a little bit more realistic
11:30with that nice little light falloff.
11:31Also, if the effects aren't stacking
11:34properly, as in you want the fire to
11:36show up before all these other effects,
11:38what you can do is increase this Z
11:41offset. So, the higher the number, the
11:43closer it will appear to you. So, let's
11:45just, for example, select this smoke. If
11:47I increase it to like 10, it will appear
11:49in front of all the other effects. So,
11:51you want to order this, set the smoke to
11:52zero, then just increase it as the
11:55effect goes on. So, you want the fire to
11:57be at like 10, then just layer it. Okay.
11:59Now for this effect, this effect follows
12:01a lot of the same principles as the
12:03other one, but let's start with the base
12:05here. This is just one fire plane mixed
12:08with another fire plane just to create a
12:10nice little gradient and add some cool
12:13little variation to it. Then at the top
12:15here is a smoke plane because without
12:18it, the scene just feels [music] a
12:19little more empty. So adding a little
12:21bit of smoke makes it look quite a bit
12:23better and quite a bit more realistic.
12:25Now the smoke's pretty similar to the
12:26other one. It's just playing at a faster
12:28speed since it's a smaller flame. And
12:30yeah, now having all of these particles
12:33does cause some lag as you can see. So I
12:35would just be aware I wouldn't add this
12:36much. Now for this window, it's just a
12:39fireball. It's a square with a whole lot
12:41of fire texture. But since this texture
12:43loops, you can increase the lifetime a
12:45little bit. Increase the rate. Don't
12:47need to go over the top with it or
12:48anything. Then you can add in a light.
12:50And this just adds some nice little
12:52light emission. So it creates a cool
12:54little effect as if the fire was
12:56actually casting light. For the roof,
12:58it's the same principle, but you can add
13:00some more smoke since all of this area
13:02as opposed to this little smaller area.
13:04Just looks a little bit better. And
13:06yeah, I'll be linking all of these in
13:08the description. If you want to look
13:10more into it or use it in your own
13:12builds, you're welcome to do that.
13:13Anyways, goodbye

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