Noise And Grain

The Noise And Grain image effect simulates noise and film grain which is a typical effect happening in film or photography. This special noise implementation can even be used to enhance image contrast as it's using a special blend mode. It also enables typical noise scenarios, such as as low level light noise or softening glowing halo's or bloom borders.

The DirectX 11 implementation is totally independent of any texture reads and thus a good fit for modern graphics hardware.

The standard version uses a noise texture that should have an average luminance of 0.5 to prevent unwanted brightness changes of the resulting image. The used default texture is an example for this.

As with the other image effects, this effect is only available in Unity Pro and you must have the Pro Standard Assets installed before it becomes available.

Properties

DirectX11 Grain	Enable high quality noise and grain (DX11 only).
Monochrome	Use greyscale noise only.
Intensity Multiplier	Global intensity adjustment.
General	Add noise equally for all luminance ranges.
Black Boost	Add extra low luminance noise.
White Boost	Add extra high luminance noise.
Mid Grey	Defines ranges for high-level and low-level noise ranges above.
Color Weights	Additionally tint noise.

Texture	Texture used for non-DX11 mode.
Filter	Texture filtering.
Softness	Defines noise or grain crispness. Higher values might yield better performance but require temporary a render target.

Advanced
Tiling	Noise pattern tiling (can be tweaked for all color channels individually when in non-DX11 texture mode).

Hardware support

This effect requires a graphics card with pixel shaders (2.0) or OpenGL ES 2.0. PC: NVIDIA cards since 2003 (GeForce FX), AMD cards since 2004 (Radeon 9500), Intel cards since 2005 (GMA 900); Mobile: OpenGL ES 2.0; Consoles: Xbox 360, PS3.

All image effects automatically disable themselves when they can not run on end-users graphics card.

Page last updated: 2012-09-05