Control growth parameters of the Advanced Wood map.
- [Instructor] Picking up where we left off last week. We are exploring the parameters of the Advanced Wood texture. I've got an ActiveShade rendering running and the Slate Material Editor open with the parameters of the Advanced Wood texture displayed. Let's go a little bit deeper into these settings in order to art direct the look of the grain. Specifically, let's go into this Weights and Ratios section. This is where we can control the spacing of the rings and the overall chaos or shape of the grain.
Let's turn off these three at the top here, Fiber Cosine, Fiber Perlin Noise, and Growth Perlin Noise. We'll get back to those in a moment. But I want to disable those just so that we can have a clear picture of what the other parameters do. Ring Thickness is pretty obvious, it's the scaling of the concentric rings here. I'll leave that at its default of .75. But getting closer in the Perspective view, so we can see the transitions between the early and late wood more clearly.
We've got Sharpness values here that determine the gradient of that transition. I'll set the Sharpness for both Early and Late Wood to values of one. And we'll get instantaneous transitions here, no gradient. And that will help us understand what Late Wood Ratio does. These three parameters provide a very simple simulation of a growth pattern over the course of a year. The Late Wood Ratio is the amount of the entire cycle that is taken up by the Late Wood.
If we set it to its maximum of one then the entire surface becomes Late Wood. If we set it to .5 then half of the surface is Late Wood. I'm going to set the Late Wood Ratio to .3 and now we can play around with the Sharpness. Those Sharpness parameters correspond to the transition from winter to summer and summer to winter. The Early Wood Sharpness is the transition from winter to summer.
And we want that to be a slow transition coming out of winter. And so we want the Sharpness to be pretty low. I'll set the Sharpness to .2 and we get a large gradient with a low Sharpness. And then the transition from summer to winter is more sudden, so we want more Sharpness. I'll set that to .6. And now the period or cycle here is more or less naturalistic and we can go back to these others Weights and Ratios.
Fiber Cosine produces large angulations. And we'll see that if we dolly back. Once our ActiveShade renders enough we can see that we are getting this Cosine effect here. We can turn that on and off. So here it is with Cosine off and Cosine on. Then we have Perlin Noise, which is going to deviate this pattern. Turn that on. And we have an amount parameter for that.
I'm going to increase it to 0.6. Now I've got a much more naturalistic wood grain with a little bit of chaos inserted with Fiber Perlin Noise. And then Growth Perlin Noise is variation in the amount of growth per year or per cycle. And that, of course, corresponds to the distance between the rings. We'll turn Growth Perlin Noise on and now we have differently sized rings. We're nearly finished.
I just want to offset the pattern in space here, so we don't have this knot through the center. In the Coordinates section we have an Offset value. If we increase the Y Offset we can see how it's going to shift to the left. I'll set the Y Offset to a value of 30 and now that knot is pushed completely off the edge of the desk. With our pattern established now we can go back to making sure our finish is correct. Scroll back up to the top and we have the General Roughness.
Set that to .25 for a semigloss finish. Bring our Color back down, set the Early Wood Color, a value of 50. I'll tumble around a little bit, so we can see this from another angle. We've got a high Power for the Late Wood with some very dark, contrasty lines. Set the Late Wood Power to 1.1. And finally, reenable Use Perlin Noise for both the Early Wood and the Late Wood.
And also reenable Use Bump and bring it down just a little bit to a very low value of .001. Okay, we started with a 3D Mahogany preset, but made quite a number of changes in order to optimize and art direct this Advanced Wood texture.