Making a lawn with CHAOS SCATTER
We can create a grass lawn in 3Ds Max in a few ways. One of them is to use the standard scatter. Corona 8 introduces Chaos Scatter, so let's take a look at its basic features.
Where can we get grass samples? Another new Corona feature is the Chaos Cosmos library, where you can find various 3D models, textures and more for our projects.
Of course, you can use any models from your computer.
Chaos scatter allows us to control the distribution of grass,trees, and much more.
We can create a scatter object from the ChaosScatter toolbar and under objects.
The Сount is the number of instances that are created and we can increase or decrease this number to make the grass on the lawn sparser or denser.
Slope limitation dictate where trees should grow based on the angle of the surface. Press World currently at 180 degrees, the trees are going to grow everywhere and as we lower the amount, so does the area where the trees can grow.
In case we place trees, we can see that they are leaning in the direction of the ground that they are on. Let's use the Normal vs. Z controller. We can change the alignment of trees. By default, "0" - it's going to take on the direction of the distributed on normal. Change this to "1", and objects will be aligned on the Z axis and oriented vertically.
Some new objects will be intersecting. Turn on Avoid collisions on 100% and none of the objects will overlap. Lower the amount of 50%, the objects can overlap and this will make a lawn or forest denser.
For more randomization of our objects, we can use the Transformations rollout. We can use Translation to randomize the height of the start of the objects. For trees in the forest, if we make the translation in the Z, anywhere from minus one meter to zero, some of the trees start lower.
Make Rotation to 360 degrees. This means that the objects can be anywhere between zero and 360 degrees. If it will be zero, the objects would face all in the same direction. So 360 is better for a lawn.
The Scale percent will add more variation to the scale of our object. At a 100% all of the objects will be the same original size. If we make this 80 and 120%, then the tree or flower will be anywhere between 80% and 120% of the original object size.
We can find Spline includes and Spline excludes under Areas rollout and add the spline to the excludes. We can use the Near and Far distances to control the width and the fall off of our path.
Chaos Scatter Lister allows us to list all of our scatter objects and we can select enable and disabled objects as well as change some of the parameters all in one place.
These are not all the features of Chaos scatter.
Camera clipping - when we select our camera only objects within our camera's field of view will be scattered and we can adjust the extended view to create an extra zone beyond the field of view.
ChaosScatterSurfaceColor will automatically take the diffuse color of the Chaos Scatter distribute-on object and will pass it to the instances which are scattered on it. The map itself takes only the distribute-on diffuse color, but it can be applied to any material property of the scattered instance (roughness, opacity, self-illumination, or any other). You can find it in the material editor under Maps > Chaos > ChaosScatterSurfaceColor
You can also use surface maps in Chaos scatter to distribute objects and the properties of those objects.
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