Grid

Line Color – Controls the color of the lines in the grid procedural texture. When a texture is selected, it overrides the color as long as the texture checkbox is enabled. 

Fill Color – Controls the main non-line color of the procedural grid texture. When a texture is selected, it overrides the color as long as the texture checkbox is enabled. 

U Width – Controls the horizontal line width.

V Width – Controls the vertical line width. 

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 back side of polygons as invisible for the camera. 
Force opaque – Renders the back side of polygons as invisible to all rays, except shadow rays.

Compatibility with – Select the compatibility type of the exported map from Max or Maya.

H – Specifies the height of the texture sector.

Invert – Enable to invert the color of the texture.

Invert Alpha – Enable to invert the texture alpha. Please note, that the Invert option has to be enabled, otherwise only the color is inverted.

Jitter – The amount of random placement variation.

Placement Type – Select how to place the texture.

Full
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 phase. 

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. 

U/W – Specifies the U/W coordinates of the texture.