Join Dave Schultze for an in-depth discussion in this video Critical quality settings, part of Rhino and V-Ray: Rendering.
In this video I'm going to review the group of settings that most affect your image quality. Without this understanding, it's way too easy to spend hours tweaking settings and rendering over and over, hoping for an improvement. Now V-Ray has many settings affecting quality, while Rhino has only one, so let's start there first. Before I show you, I'm going to switch over to Shaded mode. I want to zoom in on some of this rounded geometry. Now the setting we're looking at is called Render Mesh. And this is just a viewport approximation of the NURBS geometry.
So you're always seeing small triangles, which can be scaled up or down as needed. And these are only in the viewport, just for quicker feedback. So here we're seeing little gaps pulling away. There's gotta be a better example over here on the back side of this TV. So you're noticing that the geometry wants to be super smooth, but we have these little jaggy straight sections. So, those will appear when rendered as uneven, so let's fix those. We're going to go up to Tools > Options and the very top under Document Properties we have Mesh, by default usually, although you can change this, it is Jagged and Faster.
What we want to do is just switch it to Smooth and Slower. As soon as we hit Preview or OK, it's going to rebuild that viewport mesh and it's going to be quite a bit smoother. So take a look at that rounded edge, right after the wheel finishes spinning. So there, now it's much smoother. Now, if you have specific geometry where it's not smooth enough. By the way, as we zoom out, it's going to be refreshing the other geometry in the scene, so you'll notice some delays. Anyway, I was talking about how to get even more smooth geometry.
So let's select, maybe this little simple sphere here, and under the Object on the Properties, we're going to pull down here until we get to Render Mesh Settings. So, we've already used the scene defaults, we went from jagged to smoother. We also modified the mesh of individual objects. So select Custom and then click on the Adjust button and here you can see we're at 65%. I usually turn off the Simple planes and textures. And then you can also go to Simple Controls, and you can see here we're in the middle.
You can crank that to the max or go back to the Detailed Controls and you'll notice it's up at a 100% or 1.0. So if you hit OK, that one object is now far smoother, although it's probably not a big jump since it already was fairly clean. So that's it for the Rhino quality settings, let's jump over to V-Ray. I should mention that usually, you won't want or need to touch these finer settings, because it's far better to control them with presets, which we will cover later. But after you master the basics, it's very good to know where these are for reference.
The key words we're going to be looking for are samples and subdivisions, and these are found in multiple locations throughout V-Ray. Let's go to our options editor and we'll first talk about samples. I'm going to find an example of this under DMC sampler. And here you see minimum samples, its currently set at eight, that's just one example. You'll see far more listings of subdivisions throughout the V-Ray interface. So let's take a look at a couple of those. Under Irradiance map, we have subdivisions for this Hemisphere setting, that is the GI skydome, so it can be subdivided further and further.
And if I didn't mention it, both subdivisions and samples, have higher quality with higher numbers, and almost always eight is the default. Sixteen is excellent quality and I've never gone past that, but 32 is pretty much your theoretical maximum. 'Kay couple other locations. Here's your Brute force GI, there's some more subdivisions there and you'll notice it's eight by default as well. Also up here we have an Image sampler with more subdivisions. This actually is a range of maximum and minimum.
So that's it for the option editor. Let's talk about materials. So, under this Penguin orange skin, you'll notice we have Glossiness, we have our Diffuse, and over here is Subdivisions. So there's our standard, eight by default. We can bump it up to 16. Again, 32 would be like a theoretical maximum. I'm going to zoom back out. And also, we have similar settings for lights in the scene. Let's select this light up above. If it's not selected already, we have Object and you want to go down to Light. There's our intensity settings and here we are, subdivisions.
Again, the eight default, 16 would be excellent quality, with 32 as a fairly theoretical maximum, which I've never used. Let's switch back to rendered mode and just recap by saying, we just covered the quality settings that you may possibly want to explore if the rendering is not quite as expected and you're interested in being very nerdy. However, V-Ray can simplify all of your quality needs. If this is an area of concern, then check out the video on presets and VR options.
- 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