Noise Simplex

Amplitude – Controls the amount of distortion in the noise. A value of 0 make these a straight line.

Frequency – Controls the the amount of Noise generated. Higher values create smaller, finer noise.

Frequency Ratio – Controls the amplitude ratio between two consecutive levels of the fractal noise. A value of 0 makes only the first noise level affect the result, and a value of 1 makes all noise levels affect the result with the same weight.

Ratio – Controls the fractal noise frequency.

Scale – Controls the translation for the noise UVW coordinates.

Threshold – Threshold value for the noise. Clamps all values going beyond the specified one.

Alpha From Intensity – Specifies where to take the alpha from.

Bitmap alpha – This is the default setting. With this option selected, V-Ray renders the material the same on both sides. 
Color intensity/luminance – Renders the backside of polygons as invisible for the camera. 
Force opaque – Renders the backside of polygons as invisible to all rays, except shadow rays.

Compatibility – Allows you to match the result of the texture in Blender to that in either 3ds Max or Maya. If Alpha From is set to Maya:

3ds Max – The resulting alpha of the texture is the intensity of the texture.
Maya – The resulting alpha of the texture is the color luminescence.

Distortion Ratio –

Distortion U/V –

Gamma –

H – Specifies the height of the texture sector.

Invert – When enabled inverts the colors in final result.

Invert Alpha – Inverts the alpha channel if Invert is also enabled.

Jitter – The amount of random placement variation.

Noise Type –

Octaves – Controls the number of functions to use when calculating Perlin Noise.

Placement Type – Select how to place the texture.

Whole texture is valid
Crop
Place

Tile U/V – Enable to choose between a horizontal or vertical tiling.

U – U coordinate of the texture sector. 

UV noise phase – Specifies the UV noise iterations. 

UV noise amount – Specifies the UV noise amount.

Animate UV noise – If enabled, the noise is animated. Use the UV noise phase to animate the noise.

UV noise levels –  Specifies the UV noise iterations.

UV noise on – Enables the noise. 

UV noise size – Specifies the UV noise size. 

V/W –