Getting Started RENDERING in Blender - Rendering Beginners START HERE!

whoo what's up guys Justin here with the CG essentials compaq with another blender rendering tutorial for you so in today's video I wanted to kick off my series on how to create renderings inside of blender so as a lot of you know rendering is basically the process where you can apply light to a scene in order to create more realistic images so you're basically simulating the way light is going to interact with their scene in order to generate a more realistic picture and so this series is gonna be dedicated to kind of walking you through those different principles so that you can get more comfortable working with rendering the inside of blender as we move forward in this series feel free to leave a comment down below with any questions that you might have I will try to answer those the best of my ability now let's go ahead and just jump into it alright so this series is actually a series I've been really excited about doing because I've wanted to create something that's kind of start to finish I think rendering is a little bit it's one of those topics it's a little bit more difficult to teach then maybe modeling and so I'm excited to get into some of these principles and kind of talk through some of this stuff and I wanted to do something specifically broken out from the modeling because I think these get rolled into modeling tutorials a lot of the time this is really designed to teach you all of the principles that you need in order to create really great renderings and so to start off I think a lot of you know this but rendering is basically the process where you take light and apply it to your scene and so when you take light and apply it to your scene what's gonna happen is your computer is going to simulate the way things are going to look once that light is created so you can use this to simulate like sunlight bouncing off of bouncing off of glass or you can use this to create different shadows and other things like that inside of your models and so to start off let's talk about how to get to the rendering inside of blender and so you can see how I've taken I've created a very simple scene basically what I did is I took a cube and I scaled it up and then I deleted the vertex on this corner that gives me kind of a background or a wall back here and then I've got a floor I've got a cube and then I've got another plane that's slightly above the ground over here and I also have a light source it's a very simple scene but it should give us some of the information that we need in order to really work with this so the first thing I want to point out is how to get to the rendering inside of blender so the way that you get to rendering is an upper right hand corner there's these four options for the different kinds of viewport shading and you can move between them so you might have used these to go to like wireframe mode to see just edges or this one right here only shows you the solids or the faces this one will show you the different materials in here and then the last one is the one that's going to activate render and view so when you click on this you can see how this is going to create a rendered view for you and so when you first do this your scene may look something like this so when you first do this your scene may look really dark and so the reason for that is because in order to really do any rendering you need something that's going to create light right so it's just like being in a dark room right if you don't have any lights in the room it's gonna look really dark and so you can add lights as objects inside of blender so you can do that either by going up to add and going into light or you can do a shift day and you can go down and you can add a light object there's a number of different light objects in here I actually have some more that I've downloaded as well but for right now we're gonna focus on these first four so and we'll get into these more in a future video so for right now let's - go ahead and add a point light so what a point light is is it's basically a light that is like a point in space that emits light so it's an object that emits light in every direction and so let's go ahead and let's move this up so just G Z g m-- Y so this is kind of up in the air and then let's take a look at what this is doing and I'll go ahead and turn my screencast keys on for you guys so that you can actually see those but you can see how what we have now if you look at our scene with our rendering turned on is you have a light right here that's casting in your scene and so what that light is doing is that's basically giving us the information so that we can kind of see what the different rays are doing so you can see how for example if we were to look at the backside of this cube it's very well lit up because this is directly this is directly emitting light at this cube we're on the other side if you look at this it's very dark and so it's very dark because the cube itself is blocking the light and so what what that means is that means that we get shadows on this face notice that this is kind of jumping around a little bit that's not a huge deal right now we can talk about that a little bit more in the future but just know that your different lighting sources are going to be what generates things or what creates things like your shadows and other things like that and so if we were to add a different kind of light so let's say we were to add maybe like an area light instead I'll move this up we'll rotate this you can see how this light casts light in a direction right so it's got like a basically an area in here and this entire area is going to cast light we'll go ahead and turn off our point light for a second and so you can see how this casts light in a different way so this is going to cast light based on the size of the object and the direction that it's pointing so notice how I can click and drag this in order to adjust the direction that this is pointing so there are just multiple different kinds of light in here that we can use I'm going to turn that one back off we'll turn our point light back on so just know that for your scene is going to need a light source and then the next thing that's going to affect the way your renderings look inside a blender is going to be the materials that are applied to your objects and so the reason for this is because different materials interact with lighting in different ways so for example if you were to look around the room that you're in you're gonna see a lot of different kinds of materials so for example if you see anything that's metal or metallic or Chrome or anything like that you know I'm look at the way that the light bounces off of that you can see how you get reflections so that's the light rays bounce off of those objects where if you look at a cloth object in the same room that you're in the light is more like absorbed by it so you might get some very dim reflections or they might kind of look lit up but they're not really reflecting the light rays and so what happens is blender is calculating the way that materials are going to interact with your light so for example let's say we were to take this plane and let's go over and click on the material properties I'm just gonna add a new material to this so let's go ahead and change the color to something like a red so you're gonna notice if you change the color to a red you can see how this adjusts in real time along with that so the color is going to affect the way that this looks but these other settings so these other settings are going to affect the way that this object is going to interact with your light as well and we'll get any of these in more detail in the future but for example let's say that we wanted this object to be more reflective so we wanted it to reflect more light what we would do is we would change the value for roughness and so if I was to take the roughness value and drag it up you can see how the more I drag this up the less I'm getting like reflections of the whiteness of the light in here but if I was to drag it all the way to the left you can see I'm getting very strong reflections of this light so if I was to drag this all the way to the left for example I'm basically getting a reflection of this circle on this surface so by adjusting these different settings we can adjust the way these surfaces are going to interact with light in order to get a more realistic effect so there's other things you can adjust to so you can make this more metallic to make this look like metal there's a lot of different things that you can do in here with that that we will get into in future videos but just know that your materials are really going to drive it the way that your rendering looks and so now let's talk a little bit about the difference between cycles and Evi so if you're using blender 2.0 or above I believe you have two different kinds of rendering programs built into blender and so the reason for that is because there's a lot of calculations involved in simulating light inside a blender or any 3d program and so different engines do it in a different way and so let me see if I can pull up the page just to show you what I'm talking about so basically you have two different rendering engines so cycles is the older rendering engine cycles has been built in and basically what it does is what's known as path tracing so it's a physically based path tracer what that means is that means it actually goes in and it calculates how the light rays each individual light ray is going to interact with all the materials inside of your rendering so what that's going to do is that's going to calculate all the different light bounces and everything else which is really great for getting realistic images but the problem with that is this very processor heavy right so what what it means is it means your processor has to do a lot more math basically so that's one engine built inside of blender and you can find that by going over into your scene settings and you can adjust your render engine two cycles and so what you're gonna notice about cycles is if you switch over to cycles this now gives you this kind of look where where every time that you rotate your camera everything goes kind of gray and the reason for that is because every time you rotate your camera this is recalculating the way that the light rays are going to look which is great because you can see how I'm getting a better result and so for example I'm getting a better reflection of my cube on this metallic sheet but it takes a lot longer for it to actually generate this result so and another thing is you might get this little dotted or pixelated look the reason for that is because it doesn't it hasn't calculated what the light would do in those areas yeah and so either doesn't have enough light to calculate that or it just takes a long time for you to get really smooth image so the other engine that's built in is what's known as Evie and so Evie and all of this information is in the blender manual by the way up at Docs Dublin org but Evie is basically what's known as a real-time rendering engine and what a real-time rendering engine does is instead of ray tracing if you look down below what this does instead is it kind of approximates everything using something called a rasterization and so rasterization estimates the way the light is going to interact with your objects so instead of actually calculating what the light's gonna do this kind of approximates it and so there's pluses and minuses to that the plus is that it's much faster so if I was to go back to Evie and move around you can see how this is basically real-time so I'm not having to wait for anything to load or anything like that um but you can see how you're not getting the same result so for example like this is kind of jumping around but my box in here isn't showing the reflection quite as well so what it does is it's much faster but it doesn't necessarily give you quite as good of a result from a details standpoint and so there's places for each one of these so I wouldn't necessarily say one is better than the other as much as I would say that each one has a different use so you can switch between those by going to your scene and just setting your render engine to the different engines so you can go either way with those but you can find those inside of your seat we can talk a little bit more about the differences between those in a future video but for right now let's talk about how to export an image and so first things first if we were to go up and you can export your image by going up to render and clicking on render image what that's gonna do is that's gonna pop up a window where this renders out your image but you can see how we have an issue right here which is we're not really showing our scene very well and so the reason we're not showing our scene very well is because even though we've been rotating around inside of our scene in blender what we haven't been doing is we haven't been adjusting our camera and so our cameras are going to be really important for the way that we create our renderings so if I had to zoom out right now you can see how we've got this thing kind of flying off into space so this is our camera and basically the view from our camera it's what's gonna drive the way that our scene looks and so you can see how right now this camera is looking at the scene kind of off to the side like this so you can't actually see what's going on and so what you need to do in order to get a better image is you need to move this camera so that it's actually looking at your scene right here and so there's a number of different settings for your camera which you can access by going into camera or you can also know so you can adjust everything from like your focal length and everything else but just know that those camera settings are gonna drive your image and that's really a good way to think about the way that you're rendering images is you need to think about this basically like a photographer so you're setting up your lights you're setting up your composition and then you're setting up your camera and so one real quick trip trick about this and we can talk more about cameras in a future video as well is if you tap the N key in order to open up your menu over here and you click on the button for view there's an option in here to lock your camera to your view so what that means is that means you can check this little box and then if you type 0 on your numpad this is basically going to move your active view into what your camera is seeing and then you can move your camera by adjusting your actual view in here so what that means is you can actually preview what you're going to see inside of your rendering by moving this camera around and basically everything inside of the yellow box is what's gonna be shown inside of your rendering so now for you to go up to render and click on render image what that's gonna do is that's gonna create a rendering from that camera view inside a blender and so one last thing I want to do and then I'll show you how to save your image is I want to talk a little bit about the the performance difference between cycles and Evi so we talked about that a little bit but you can see how this has Eevee currently activated and so what that means is that means that final result is going to be created through the Eevee rendering engine so if you look at this so I'm gonna take a screen capture of this actually just so we can kind of compare them but let's take a screen capture here notice that it took less than a second to create this rendering now let's go back and let's set our rendering and jinda cycles and then do the same thing so if I click on render click on render image you can see how this is going to go through and this is going to create a rendering but notice that it's taking significantly longer than when we were then when we used Eevee so Eevee was able to spit that image out in less than a second this is going through and it's rendering out your scene and there's different settings you can change in order to adjust this but you can see how this is taking a lot longer but it's also a significantly better result so I'll kind of try to bring these in side-by-side as best as I can just so you can look at them there we go so if you look at these two images what you're gonna notice is other than the slight graininess which I would need to add some more lights to this scene in order to get rid of you can see how over here I'm getting very I'm getting some results that are very detailed right like you can't see a very good reflection of my cube on the left-hand side and this is just kind of like a straight line through here this material gets very non reflective so you're just not getting the same subtleness of your lighting in the Eevee rendering that you got from your cycle during you can see how the cycles rendering you get the reflection of your cube right here so you just get a better result if you're looking for things right clear things like reflections and other things like that there are some things you can tweak an Eevee to get a better result but just note that while the Eevee result took under a second it gives me a different result in the cycles render and so sometimes we're gonna use cycles sometimes they're gonna use Eevee it really kind of depends on what we're trying to do but just know that they're different and that there's a time and a place for each and then once you're done with this you can just go up to image and click on save or save as in order to save a copy of your image for use later so you can use this image once it's been rendered so you can just do a file save as and save that as an image file so that's permanent in this video we will get into all of this more in depth in future videos but I wanted to give you kind of an overview of the way that rendering works inside blender leave a comment below let me know what you thought if this was helpful to you I just love having that conversation with you guys we have any questions leave those down below as well if you like this video please remember to click that like button down below if you're new around here remember to click that subscribe button for new blender content every week as always thank you so much for taking the time to watch this I really appreciate it I will catch you in the next video thanks guys

Channel: The CG Essentials

Views: 17,152

Keywords: blender, blender 2.82, blender 2.8, blender modifier tutorials, blender tool tutorial, the blender essentials, the cg essentials, thecgessentials.com, justin geis, justin geis blender, blender rendering, blender rendering settings, blender rendering for beginners, blender cycles, blender eevee, blender cycles beginners, blender eevee beginners, eevee beginner tutorial, cycles rendering tutorial, blender render beginner tutorial

Id: ZuphBWAHZ8o

Length: 17min 48sec (1068 seconds)

Published: Wed May 06 2020