How to use VRay’s camera aperture coefficient? VRay camera aperture coefficient usage tutorial

VRay is a renderer that combines ray tracing and radiosity. It provides high-quality picture and animation rendering, making it convenient for users to render various pictures. It is an essential rendering tool for designers, indoors Material production, lighting and rendering aspects of design are widely used. There are many friends who want to learn VRay. In order to help more friends quickly learn how to use the VRay renderer, the "VRay5.0 Realistic Rendering Tutorial from Basic Introduction to Extreme Speed ??Improvement" tutorial is launched to help everyone quickly learn the VRay renderer.

VRay camera aperture coefficient usage tutorial

There is a field of view below.

This field of view is what we can check in the following parameters. Control the area visible to the camera in the scene. We can adjust it and adjust it upward.

When we increase it, you will find that the field of view will be larger and the scene will be further away from us. When we adjust it downward, it's the opposite.

There is a scaling factor below.

This scaling factor is the same as the field of view. It also reduces and enlarges the range of the field of view, but there is one thing that this scaling factor does not enlarge. The distance between the camera and the scene. It only zooms in and out within the field of view. First uncheck the field of view. We can see that when we reduce this value, the smaller the scene becomes.

The further away from us, of course the reverse is true when zooming in. It is the same as the field of view. We can choose to use one of them.

Then there is a horizontal movement here.

By moving this value, we can translate the position of the camera, and we set it to 0.

This moves vertically.

If you pull it up and down, you will find that this will also move vertically.

We can use these parameters to adjust the range and size of the field of view.

We can also adjust the position of the camera through them.

There is an aperture number below.

It controls the size of the camera aperture, but the parameters here are actually in fractions. For example, when it is set to 6, then It's actually one-sixth, if we set it to some other value then it's one-Nth.

Then it means that if we set this value larger, the corresponding value will become smaller. If we set the value here smaller, the final value will become larger. We can summarize one sentence, that is, if we set this value larger, the size of the aperture will be smaller, and if we set this value smaller, the value of the aperture will be larger.

So what effect does the size of the aperture have on the light on the camera? If the aperture is large, it means that the amount of light entering is relatively large, and the picture will be brighter. If the aperture is relatively small.

That is to say, the amount of light entering is relatively small, so the picture is relatively dark. Let’s set the aperture number to 4 and let’s render it. When we set it to 4, everyone must know that the size of the aperture is four points. One, when we set it to other values, it is one-Nth. Here we mainly compare 4 and 6. Before rendering, we adjust this parameter first.

First of all, this common parameter is the same It is a ratio of 1.28. We set it to 400×300 so that the parameters are smaller and we can easily get the final result.

The global switch here is set to expert mode, the default lighting is turned off, and other values ??remain the same as default. .

Image sampler (anti-aliasing) We set this type to fixed to make its parameters smaller, so that we can render the results quickly. We keep other values ??as default.

We select the index for exposure control, and the other values ??remain unchanged.

Here we turn on GI, change the mode to expert mode, the first bounce is the luminous map, the second bounce is the light cache, and the multiplication is set to 0.95.

We set the luminescence map to very low, we also set it to expert mode, the subdivisions were set to 30, and we checked Show Calculated Phase to Show Direct Light.

Just set the lighting cache subdivision to 100.

In the system, we set it to expert mode, then cancel the display message log window, check the frame mark and delete some Don't leave any rendering time behind.

After setting it up, let’s take a look at the rendering.

After rendering, let’s make a copy. Keeping other parameters unchanged, we set the aperture number to 6. Let’s do it again. Let's see what the result is.

Let’s compare the two. You will obviously find that when we set the aperture number to 6, because one-sixth of the aperture is smaller, the scene will be larger when one-quarter of the aperture is set. It is brighter because it takes in more light, and at one-sixth the aperture number is smaller, so it takes in less light and the light is darker.

So how do we make good use of this parameter in actual work? If we create daytime effects because the light is relatively sufficient, we can set the aperture value larger, so that Can control the entire scene.

If we are making a night scene, because there are relatively few lights at night, so if we set this value smaller, it will make the scene brighter. This is how we proceed. use.

That’s it for the VRay camera aperture coefficient usage tutorial. I hope the above content can help you. If you have other questions about using the VRay renderer, you can take a look at these VRay tutorials. , click this link: