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I made a couple more adjustments to the positions of the lights, and we're ready now to lock down those lights, and then move on to adjusting the material, by adding a bump map, to vary the highlights. Let's take a look at what we have so far. Open up the Rendered Frame window. And, I moved the lights a little bit, so we're getting a bit more definition, on those contours. Let's go ahead and clone that rendered frame window and then let's minimize these views. Go back into manage layers and freeze the environment and freeze the light's layers.
And we're just going to add a bump map to our existing watch body material. Go back into the material editor. And we'll dolly back a little bit with the wheel. And then use the middle mouse button to pan. Here's our watch body, bring that up. And we want to add a simple bump map. And it's going to be a noise map. You'll see under Standard, we've got Noise. We can drag that in and then connect that to the bump channel of the watch body. And then double-click on the noise map. We want to make a couple simple changes in here.
If you want to see a preview, we can right-click and choose, Open Preview Window. But it won't look like much, because we've set the scale of our preview to be only 0.1 centimeters. I'm going to set the size of the noise to only 1. But we won't see much here, because the scale of this preview, isn't quite right. So we'll, we'll need to go back into our Options. Under Modes > Compact Material Editor, we'll switch to Compact Material Editor. And select the Options. And set the Render Sample Size here, to 5 centimeters, which is about the same scale as the watch itself.
Click OK. And then go back to Slate Material Editor mode. We can close that preview window, and then reopen it. Right-click and Open Preview Window. And now we can actually see that noise at the same scale it'll be applied onto our object. And the last thing we want to do in here actually is give it a fractal pattern. Which means we're going to have noise that's more complex. It'll have sort of waves of noise inside of noise. And if we want more detail, we can increase the number of levels here. And the more levels you have, the more detail you'll have. If we have only one level, then it's not fractal at all.
Default of three is probably fine. Okay, that's fine. So, we can go ahead and close that, and go into, the material itself. Double-click on the material node, and we need to enable the bump map. Scroll down and under Special Purpose Maps, we need to enable, the bump, and maybe increase it a little bit. Let's give it a value of 0.15. And then do a test render. Okay, with the bump map we can see that there's a little more variation in the highlights. Let's compare that to our previous rendering without the bump map. And so on the left there's no bump map, and on the right there's a bump map.
And you can see the difference, especially here and here. And in this rim, you can see a difference as well. So we just added a little bit more chaos and visual interest to this. Another thing that we'd like to do here is to just make sure that the hands and the markers on the watch are kind of evenly lit. And to do that, we'll make a different material for them. Go back to our material editor. We want to clone this one. So I'm going to hold down shift and drag And we actually clone the network, but you'll notice that we also got a connection to that bump map.
We don't really need the bump map on this new material. So, we can select that wire. Click on it till it's highlighted, and press delete. And that'll break the connection. So I've got the watch body material here, and that's fine. And I've got this new one. Let's double-click on that, and we'll call that watch hands. And it doesn't have a bump map. And additionally just to make sure that it renders more flat and even, we're going to increase the roughness and that adds a sort of microscopic noise pattern to it that causes the lighting to sort of even out.
And we need to assign that to the hands and the markers, go back to manage layers, select hands and markers. Select the highlighted objects and then assign the material to the selection. Alright, so that's done. And then one last thing we can do to help those highlights is to give it a little bit of burn in the exposure control. Go into the Rendering menu under Exposure Control. And remember, previously, we set the Image Control parameters to neutral settings.
But if we want a little bit hotter highlights we can increase this Burn amount. Be aware that this is an incredibly sensitive parameter. Even tiny, itty-bitty changes will have a major effect on the screen, so the default was actually 0.2, which is going to blast those highlights out incredibly. I recommend a value here of 0.02. Or 1 tenth of the original amount. And that doesn't even cause that graph to change at all. But it will give us much shinier highlights in the rendering.
Go ahead and test render that. Okay. Now we're seeing much better results on this, and having changed the color of the markers so that they are more consistent, you can actually see them standing out against this back ring. And that kind of tells me that I probably want to have that ring be black. Just going to make a little bit of a design change to our model here by changing the material on that back ring. So I'll go and select that. We can go to the Manage Layers window under watch body we've got this inner ring. I'm actually going to move that into this back layer.
Select it and then select back. And then move it into that layer. And just double-check that it's selected. So in fact it was not selected. So now it is. Cool. And you can see it's sort of outlined here. And we want to just assign that back material to it. Go back to the material editor. And remember, we've created a material for the back of the light, and it's here in our scene materials, black matte. I'm going to drag that over, choose Instance, and then select it.
Then assign that material to the selected object, which is the inner ring. Close all of that and then do a final test render to check that.
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