I used a bind with a bump and a single mapped texture something like this.ĭon't worry about the light and the shadow at this stage. Focus on the shape of grass that we want. You will need to create a simple material for the ground. Create two parts, one really small and another the final size we will configure and test-render the small part until we are happy with the look, and then share brushes between the two to update the large section. Then, adjust your brush size and start painting on the terrain. Make your terrain paintable (from the Paint Effects shell and the second icon or from the Paint Effects menu option "Make Paintable"). (I told you before that we need at least two kinds of grass to get a realistic image. Let's start with the l brush, this will be our first kind of grass. Now go to your Visor and select a Grass brush. This speeds up rendering tests considerably. You can then configure the small part of grass and update the larger piece's configuration. As you will see, you can create a little piece of grass and a large section of it. This is an important feature, it lets you copy the configuration of one brush to another so two brushes can work simultaneously. I will not go too deep into the options here, so feel free to experiment on your own. This is what the Visor looks like.Īnd, of course, we have the Paint Effects panel in the Rendering set. Some of the icons are for selecting different brushes others are for configuring the brush, or for painting with the current brush, or using the Visor. This is what the Paint Effects shell looks like. First, let's create a simple scene. Create a plane (either NURBS or poly I'll use NURBS for this tutorial) and sculpt it a little to give it variations in height. I use Maya 7 with a Dell Precision workstation (Athlon Duron processor, 949 MHz, 768 megabytes of RAM). This image took 2.00 seconds to render at 640״80 resolution. This is the image we will create in this tutorial. Now that you understand how light and shadow work in a more theoretical sense, let's open Maya and start actually creating our image. This combination of soft, semi-transparent shadows and harsh shadows gives the image realism. In places with strong light, we see strong shadows but where the light is softer the shadows are softer and more transparent. In the third image you can see that the light is more uniform (mainly because the grass has uniform size). You can see how the shadows (the second image) are random and have many different sizes and shapes. I am not saying that the individual shadows need to be very strong, just that there needs to be a distinct contrast between the tip of each stalk and the root. We need lots of contrast between the top and the bottom of the grass to produce a really realistic image. As a result, very little light reaches the ground. Each stalk of grass casts a shadow on the ground and on its neighboring stalks. You can see that the top of the grass gets plenty of light, and the bottom of the grass has dark, irregular shadows. The red arrows show how the shadows work, and the blue ones show where the light goes. Notice how many different kinds of grass and other plants there are in this little space! There are also some pieces of wood mixed in. In addition, you must vary the size and color of your plants throughout the scene. So, if you want realistic grass, you must use several different kinds of plants in your image. There are some flowers, some weeds, some dried-out (dead) grasses, and so on. This photo contains many different colors, sizes, and types of grass. You will almost never have a single kind of grass in your scene, because in reality there are always other plants mixed in with the grass. Here is the final image that we will create Tutorialįirst, we need to understand what grass looks like in reality. You can find this tutorial in the official Community of Autodesk-Maya User In this tutorial, I will describe how to create realistic 3d grass using Maya's Paint Effects. Later I learned how to do it, and now I have created a tutorial on the subject. Some time ago I was trying to find out how to create realistic grass and plants for a university project, but I could not find anything. Hi everybody! My name is Isidro, and I am from Costa Rica.
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