The texture is a gradient that goes from black at the top (or fully transparent) to white at the bottom (or fully opaque). The image below demonstrates how a texture can help define which parts of a mesh should have transparency and how transparent they should be. You can also define opacity with a greyscale texture. The image below shows opacity values increasing from 0 to 1 on a Static Mesh. Opacity values between 0 and 1 yield pixels that are partially see-through. When Opacity is 0, the surface allows all light to pass through. When Opacity is 1, the surface is fully opaque, meaning it blocks 100% of the light that hits it. In Unreal Engine, transparency works by assigning each pixel an Opacity value between 0 and 1. You can use transparency to simulate a variety of different real world surface types, including those listed below.

Stained glass transmits some but not all light, and therefore it is a surface with transparency. For example, a brick is an object that has no transparency. Transparency is the term used to describe a surface's ability to block or allow the passage of light. In the following tutorial you will learn everything you need to know about how to use transparency in your Unreal Engine Materials. In other words, the opacity value determines how transparent or opaque (how see-through / hon see-through ) a surface is. Opacity is used to define degree to which a surface transmits light. Transparency is used to define whether or not a surface can be seen through.

In Unreal Engine, Transparency and Opacity have two distinct meanings. In the real world, these properties are referred to as Transparency or Opacity and the two often used interchangeably to describe the same thing.

When creating certain surface types such as water or glass, you need the ability to make the surface not only see through, but also give the surface a sense of depth and color.

Materials that are translucent