Modeling and Animating Toothbrush Bristles: Setup UV Map and Color Map for Bristles

Photo of Vic Garcia

Instructor Vic Garcia

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  • Duration: 06:41
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  • Made with Release: 16
  • Works with Release: 16 and greater

Prepare UV map and and Color map for hair color using Bodypaint UV Edit and 3D paint.

In this lesson, we will use the Bodypaint UV Edit to quickly create UV’s to use as a guide to color the bristles. We will then jump into Bodypaint 3D paint and create the color map for the hair bristles.

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- In this lesson, we will use BodyPaint's UV editor to create the UV map to use as a guide for the bristle clump colors. We'll then use BodyPaint's 3D painting tools to paint the bristle color map. Here's where we left off in the last lesson. Before we jump into BodyPaint, let's go ahead and rename the bristle bolt duplicate. This is our hair surface, so let's go ahead and call this hair_growth_surface. Let's go up to layout and let's switch over to BP UV edit. Mine has the word user right beside it, that's because this layout is set up for recording. You'd just use the one that says BP UV edit. In the UV edit, let's go ahead and select UV polygons. Once we do that, you'll see that we have our one polygon map. It's one island, which is one cylinder that represents all of these tiny little caps, and that's not what we want. We want each one of these caps to have its own UV island. Let's do that, let's go ahead and jump to the top view, press F2. In our UV mapping tab, let's select frontal. We're going to map this right from the top, then you'll see we have a nice UV map now for each one of the caps, and this is what we want. It's a little small right now, we want to fill this zero to one UV space. Let's get the scale tool and let's scale this up. Let's move this down into position. We want to make sure that we stay inside the zero to one area, so I'm going to grab the scale tool and just scale it down a little more. That looks pretty good. Okay, so we're done in UV edit. Let's switch over to BodyPaint 3D paint. Let's go down to the materials tab. We need to add a material and a texture to paint our color map. We're going to do that by going up to tools, and let's select paint setup wizard. This dialogue box will appear. Let's make sure that we have object selected. Let's also make sure that we deselect the one that says toothbrush_base_subd. We don't want to add a material to this, we already have one on those. We only want a material on the hair_growth_surface. Click next. Let's deselect recalculate UVs. We don't want BodyPaint to create our UVs all over for us, we already did that, so let's deselect that, and let's keep single material mode to on. Go ahead and click next. For our material options, let's leave everything to default, and for the channels let's just have color selected, that's all we need. Let's leave our texture set to 1024, this will be a 1024 by 1024 texture. Let's go ahead and click finish, and close. You'll see that a material was created. If we go to the objects tab, you'll see that the material was added to our hair_growth_surface automatically. Let's go back to materials and let's rename this material to bristle_colors. Let's go over to the texture tab and let's select our texture right beside the bristle colors material. That'll take us right into our texture mode, and now we can start painting. Let's quickly bring up our picture viewer, just so we can see what colors that we need. The top six bristles take blue, and then we have yellow for the rings, and blue for the bottom five bristles, and the center ones get white. Let's start with the blue for the top and the bottom bristles. Let's select our brush tool. We're going to lose our UV mesh, we can just go back up to UV mesh and select show UV mesh. Now, if we go in here and we start painting, you'll see that our brush is pretty small. We need to increase the radius of the brush. We can do that by pressing the right bracket, and that'll increase the radius. It's a little soft, too. I'm going to undo this. If we press shift right bracket, that'll increase the hardness of the brush. Of course, we can also do it over here on the side, you can dial these up or down. Okay, so I'm going to make this brush pretty hard. I'm going to go to the colors tab, and I'm going to select a nice dark blue color. I'm going to start painting the top six UV islands blue. This doesn't have to be perfect. Let's paint the bottom five UV islands blue. Now, let's go ahead and paint our two rings yellow. I'm going to select the yellow color. I'm just going to go in here and paint. All right, that's looking pretty good. Now, let's select the white color and paint the center section. We are done painting. That looks really nice. Let's switch over to view just to see what we have. Press F1 to go to the perspective view. Let's take a look at what we have, and there you go. There's our color map, that's looking really nice. Let's go back to the texture tab. Right now it doesn't really have a location to be saved at. If we were to save this project out right now, this would just be saved to a default location. Let's actually give it a location. Let's go up to file, save texture as. I'm going to go ahead and switch this to Photoshop, a PSD file. Press okay, and here we are in our toothbrush lesson folder. I'm going to right click in here and create a new folder, and I'm going to call this tex, and I'm naming this folder tex because that's what Cinema 4D names its default texture folder. Then I'm going to click inside the folder and save this out as bristle_colormap. Just like that. Let's switch over to our startup layout, and let's do one more thing before we finish this lesson. Let's give this hair growth surface its own layer, so let's click on this layer icon. Click on add to new layer. Let's call this layer hair_growth, and let's add our toothbrush_base_subd Boolean object into the toothbrush_base_subd layer. Let's go ahead and save out our file. Let's call this toothbrushbase_03 and save it out. We have everything set up now to generate some hair. In this lesson, we learned how to use BodyPaint to easily create a UV map and a color map to add different colors to the hair clumps. Let's go ahead and create the toothbrush bristles with the hair object in the next lesson.
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