Contrast Stretch image effect

Contrast Stretch dynamically adjusts contrast of the image based on its brightness. It does that with a delay, so when going out of a dark tunnel the player can be almost blinded by bright outdoor light. And vice versa - when changing from a bright scene to a dark one, the eye takes some time to adapt.

Like all image effects, Contrast Stretch is only available in Pro version of Unity. Make sure to have the Pro Standard Assets installed.

No Contrast Stretch applied.

Contrast stretch applied with a dark skybox. Note that buildings get brighter.

Contrast stretch applied with a very bright skybox. Note that buildings get darker.

Properties


Adaptation Speed	The speed of the transition. The lower this number, the slower the transition
Limit Minimum	The darkest overall contrast value that the Camera will be adjusted to
Limit Maximum	The brightest overall contrast value that the Camera will be adjusted to

Tips:

Contrast Stretch only works while in play mode because it's time based.

Hardware support

Contrast stretch works only on graphics cards with support for pixel shaders (2.0) or devices with OpenGL ES2.0 support. E.g. GeForce FX 5200 or Radeon 9500 and up. All image effects automatically disable themselves when they can not run on an end-users graphics card.

Page last updated: 2010-07-11