Objects that are entirely behind other opaque objects may be culled.

Most wallhacks are used to make a map's walls at least partially transparent, allowing players to see through opaque objects.

Cons: doesn't support transparency (works only with opaque objects); high memory consumption.

The color of an opaque object is just the combination of the light energy that the object's particles did not absorb.

Many other products (for example, guitars) are sometimes made with acrylic glass to make the commonly opaque objects translucent.

For this reason X-rays are widely used to image the inside of visually opaque objects.

The absorption of light makes an object dark or opaque to the frequency of the incoming wave.

Below the deck were one or two other opaque objects, one of these a small but powerful space-warping engine.

There were two smallish opaque objects about three inches apart in the middle of her stomach.

It occupies all of the space behind an opaque object with light in front of it.