Importing CAD Models into Cinema 4D: Enhancing CAD models in Cinema 4D

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Instructor Rod Ross

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  • Duration: 07:19
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In this video we give an example of how to use the bevel tool with imported CAD geometry.

In this video we give an example of how to use the bevel tool with imported CAD geometry. We show how to use selection sets and multiple bevel deformers on the same object.



- In this tutorial, we're going to talk about enhancing CAD models in Cinema 4D using the Bevel Deformer. CAD models are notorious for not having bevels. You can add them easily in the CAD program, but they're usually not needed. But for our purposes, we need bevels to get a realistic render. One nice thing about the Bevel Deformer is that it's nondestructive. So I can add bevels and modify them later if I want to, or take them off completely without changing the model. Another nice thing about the Bevel Deformer is that I can use multiple deformers on the same object. So I'll add a Bevel Deformer. I'll go to my deformers and click on Bevel. Then, I'll drag this into my Pump null. My offset is too large, so I'm going to change this to 0.04. Then, I'm going to click on Use Angle, and I'll keep the angle threshold at 40 degrees. Now, I'll go to my display and turn on Shading Lines. For my bevel, I'm going to add three for the subdivision to give us a rounded edge. Now, I'll zoom in to the bevel, and as you can see on the edges I'm having problems with my topology. So I'll go to the Topology tab. For Mitering, I'm going to change this to Uniform. Now, I have nice, clean, beveled edges on the model. Now, that's how I can add the same size bevel to the whole object. But I would like to have three different sized bevels on my object. So I'll click on the Bevel Deformer again. Then, I will go back to Option, and I'll uncheck Use Angle. In this case, we're going to use the selection set for our bevels. For now, I'll just turn the Bevel Deformer off. Now, I'll click on my model and I'll go to Edge mode. Now, if I type "UL" that will give me my Loop Selection tool. Then, I'll select some of these edges. If I hold my Shift key down, I can add to the selections. As you can see, it's a little tricky to get the selections that I want with the Loop Selection, so I'm going to go to Select. Then, I'll go to Phong Break Selection and I'll deselect the edges that I had. Now, I'll click on Phong Selection, and I'll adjust this phong angle. Now, you'll see these dark blue outlines that's showing the edges that would be selected. If I drag this down a little further, you'll start seeing other blue outlines on the model, and that's not what I want. So I'll move this back up. This looks correct, so I'll just leave it there. First, I want to select these flanges, and I'll hold my Shift key down and click on the edges that I want. As you can see, it's much easier to select now with the Phong Break Selection. Now, I have my first selection set the way I want. So I'll go to Select, and then I'll just click on Set Selection. I'll go here for the name, and I'll just name this "Bevel 1". Now, I'll make my second selection set, so I want to deselect this selection set. If I don't, when I make my other edge selections it'll overwrite this one. So I'll deselect it, click on my model, and deselect these edges. I'll select this edge and this edge, and that will be my second selection set. So I'll go to Select and Set Selection, and that gives me another selection set. I'll change that to "Bevel 2", deselect it, and deselect those edges. Now, I want these top edges. So I'll hold my Shift key down and select all of these. Now, I have my third selection set the way I want. So I'll go to Select and Set Selection, and I'll name this "Bevel 3". Then, I'll deselect that and I'll go to my first bevel. I'll turn it on, and I'll just rename this "Bevel 1", and I'll drag in my first selection set. Now, you can see just those edges are beveled. So I'll copy this Bevel Deformer two times. I'll rename this "Bevel 2" and "Bevel 3". I'll click on Bevel 2 and I'll drag in the second selection set. Then, I'll select Bevel 3 and drag in the third selection set. For my Bevel Deformer 3, I wanted the offset to be a little smaller. So I'm just going to make it half of that, 0.02. For my second bevel, I want that one to be larger. So I'll make this 0.1. Now, I have three different bevel sizes on the same model. One thing to keep in mind is you would want to put these in a null, like I have here, and just put all the deformers in the same null as your model. Now, we could adjust all of these bevels later if we wanted to, or just turn them off. I rendered the object side by side, one with a bevel and one without, just to show you the difference that a bevel can make. As you can see, there's a huge difference in realism. So if you're stuck with a CAD model mesh that has no bevels, or you don't have access to a CAD program, remember the Bevel Deformer.
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