Join Dave Schultze for an in-depth discussion in this video Using the material override for quick reviews, part of Rhino and V-Ray: Rendering.
This next video will cover one of my favorite techniques for evaluating a design. The viewer feature is called Material Override but I call the result a neutral form render in my class. It's fast and easy to implement. So let's jump right in. Of course we have to start off any video with an establishing render. So I'm going to click on the Glam View Port from the V-Ray toolbar, click on the Render button. And you might notice that we have all materials applied here. So this is just one of the many cases of using the Material Override. I'll go ahead and let this finish, and then we'll resume in just a moment. Okay, the render is done. Now we'll get into the Material Override. So this is accessed on the V-Ray toolbar. The Options button. And you want to go to the top, under Global Switches, and right about here is Override Materials. Now it's not activated yet, so we're going to turn that on. And then we get to pick a material color for everything in the scene. So I'm going to click on that. I recommend you go with just a grey, at least 50% or maybe a little bit lighter than that. Hit OK, and then we can close this and render one more time. Okay, the render is finished. You'll now notice that every single object in the scene has got this roughly 50% grey applied to it. So, this would include objects with materials on it or no materials on it. All get applied the same 50% grey. So one little tweak I like to do is, sometimes this can be too monochromatic.
I really want to study the form of my design. I don't want to have the background the exact same color. I want the two of them to pop. Foreground from background. So I'm going to show you this little override to the override. So we go back to the Material Editor and we select whatever material that we want to have not included in the override. In this case, I'm going to affect the backdrop. And you'll notice over here under Options, which will be second panel down. I kind of simplify this a bit. So, Options, we have Can Be Overridden, that's what's currently happening.
I want to deselect that. So, what that really means logically, is that it can not be overridden, since it's deselected. That's really all we have to do. So let's watch the difference now when I hit the render button again, and will be back when it's complete. Okay, it's finished. And you can see the big difference right off the bud, is we have all the objects that we're interested in are the same medium gray, but the background can vary from that. So it can be a lighter color, darker color, whatever you want. I've just kind of made it a little paly yellow so everything pops, just to make a point. And that can be any color you want. So the beauty of this feature, is you can get an excellent idea of the design's form without any materials or colors as a distraction. And you can do this any time whether you have materials on or not. It's really a powerful tool to help you focus purely on your design. In fact, I have seen some student projects look way better and more detailed with this neutral form render than with their file materials.
This is because a material's finish and reflections can easily hide details and forms. I highly recommend use this Material Override in your project workflow.
- Why use V-Ray?
- Installing DR Spawner
- Understanding 3D terminology
- Activating V-Ray
- Adjusting quality settings
- Get quick previews with the material override
- Understanding lighting types
- Exploring materials in the Material Editor
- Creating your own materials
- Texture mapping materials with bitmaps and procedurals
- Saving time with V-Ray presets
- Getting the right size for your render with output settings
- Working with environment lighting
- Strategies for working with cameras and camera settings
- Ensuring accurate color for your scene with color correction
- Rendering tips and tricks