Join David Andrade for an in-depth discussion in this video Light it on fire!, part of Blender: Tips, Tricks, & Techniques.
- [Instructor] Sometimes you just want to light something on fire. In this week's Blender: Tips, Tricks, & Techniques, we're going to take this monkey and let smoke up in flames. Okay, now it's really really really easy to do fire in Blender. First, you're going to hit T for tools, just open this up a little bit and I've already got a monkey here from before, he looks metal. So I'm going to go back to solid mode, I'm going to duplicate it with Shift + D, I'm going to scale him up a little bit and them I'm going to hit Space bar, Quick Smoke.
Look at that, quick smoke. And on the left here you'll see, quick smoke or quick smoke and fire. Now you're going to notice that there is a bounding box. This box is going to tell you where the fire will reach to. So if I just play it. (fumes) Look at that, isn't that awesome? But you can see here how it stops on top of this little box here right? So if I stop everything, I go all the way back to the beginning and then make this box bigger, yeah let's say about there, and then play it, you'll see that the fire can keep going for a while.
Now isn't that cool. So let's just pause that for a second and render it. And we'll get a little close here. Now this fire actually looks really really really good and we can do so much with it from the materials, to using forces, et cetera. So let's just play with it a little bit shall we? So hit Z and go back to solid mode, and you can go to the Physics tab and you can play with all of these settings to mess with the smoke, with the flames, you also create something called Dynamic Bounding Boxes so that the bounding box will grow as you go with it.
You can kick up the divisions, that way you can see a whiff a little bit more fidelity what this fire will really look like. So let me stop it really fast. 32 is good for now. You can mess with temperature difference, density, vorticity, et cetera. But one that I really like to mess with is actually, if you go up to the beginning here and just play it. Let's go to frame one.
Actually we need to restart it, that's what it is. We need to go to the end and have it restart. So let's just let it set for a little bit. Okay, now we're going to pause it and you can play again with all of these settings but there is a couple cool things that I like to mess with. So let's just go to the Node Editor. And this is the fire material, it's pretty intense huh? So just open this up a little bit. This let's you actually set the color of the fire if you really want to.
Now there's also a couple cool things you can do, you can for example, mess with the volume here. So let's just set this to render. And what I'm going to do is I'm going to remove volume absorption and go straight from volume scatter. That'll give this interesting kind of white look to it. We can also add some noise to the whole thing.
So if I want to, I can go to say, Vector and then color. And let's just reset this fire a little bit. Get out of rendered mode. Let's just simulate it again. And then go in to Rendered. Now you can really mess with kind of the look of it, add a little bit of noise to kind of change the way that the smoke looks.
Or if you really really want to, you can even just make pink fire. Let's just do that. That'll be kind of fun right? I can even set this to pink, but then set the value to something really high like three. So it's a super super super bright pink. And we'll go down the middle here to and why not, we'll set it to pink as well. Now, we've got a pink rendering fire monkey with a whole bunch of smoke.
There's a couple little things that I also want to point out. That rendering a fire works really really well on CPU. On GPU, it tends to go much much slower. And then if you really want to, you can go to sampling and switch it over to branched path chasing. Now what that's going to do is it's going to look a lot better but it's going to take a lot lot longer for it to resolve. But it is a really good setting to mess with. Fire and smoke in Blender is super super easy to use and super easy to mess with but there are tons of settings that you could get lost in.
Go in there and mess around with them and see what you can do. Maybe you can make green smoke or green fire with green smoke. The power is in your hands to light anything you want on fire.