Maya layered rendering and post-synthesis Scheme foundation

Overview Introduction

Layered rendering is actually a very traditional problem, and many friends who have participated in animation or film projects have used layered rendering to solve the final rendering problem. This topic mainly introduces the basic concepts of layered rendering and some extended discussions.

So when it comes to layered rendering, it's important to combine the compositing, because layered rendering is a composite service. Let's take a look at the following pictures:

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These three images are part of a complete image, the first one is a finished car, the second one is the projection of the car on the ground, and the third is a common background photo. Then through the synthesis software we can easily put them together, and can also in the late software for different parts of the color and modify to match. I believe that through just a few pictures we have a basic knowledge of the use of layered rendering in Maya.

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What benefits will we get after layered rendering?

When computer graphics are used to animate and film, the performance of the computer limits the rendering capability, and in order for the computer to perform its intended work, one has to divide a scene into several parts for rendering. Layered rendering reduces the pressure on the machine for rendering. In addition, when dealing with layered materials, we will be as easy to process layers as in Photoshop, for different elements of the screen color brightness and other information can be easily modified, so you can reduce the three-dimensional software modification work.

Basic principle

Let's start with the simplest layered approach. The most basic layered approach is to separate the characters, shadows, and backgrounds from the final lens to render them.

The most commonly mentioned role layers are those that are in the lens or are relatively large in motion relative to the background, such as aircraft or car props. Therefore, the definition of the role layer is relatively broad and is a relatively fast part of the motion on the scene. So the shadow layer is mostly the shadow that the object in the character layer in the scene casts onto the background, and the background layer is in the final scene part.

For future rendering convenience, the layer is usually stored separately as a layer file when layered, that is to say, how many Maya files we have in each layer. Of course, this is a more traditional approach, since the rendering layer after many layers have been enhanced, I will explore these issues in the future.

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Role Layer Files

Let's take a look at how these layers are separated, and the role layer can hide or delete the background directly when rendering.

Of course, some special situations can be hidden directly will appear abnormal effect, for example, when a door lens hides the door frame, the rendered role will be complete, and when the character is placed on the background layer, the character will become standing in the door, and if the character layer is placed below the background, the role is not visible.

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