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size

Decal size. Specifies the size of a decal material.
size= * width,height *[ * ,thickness *]
width, height
Size of the decal object in scene coordinate units (typically inches) (real, real).
thickness
Thickness of the decal object in scene coordinate units (typically inches) (real).
If neither width nor height is 0, the image is scaled to the exact specified dimensions and the aspect ratio of the image is not preserved. Setting either value to 0 preserves the aspect ratio of the image.
If thickness is specified, a drop shadow is rendered if the vignette object defines an appropriate light vector. Set thickness to 0 to disable drop-shadow rendering.

Properties

Material attribute. Only used by decals; ignored by all other materials. res= is ignored if either width or height is greater than 0. Values must not be negative.

Default

catalog::Size if the decal material is based on a catalog entry; otherwise size=0,0,0 . The decal size is calculated from res= if wid and hei are not specified or are set to 0. No drop shadow is rendered if thickness is not specified or set to 0.

Example

A MSS for a decal, which is sized based on resolution, rotated by 20 deg clockwise, and has a thickness of 2.5 inches, for an appropriate drop shadow effect:
…&decal&src=myDecal.png&res=34&rotate=20&size=0,0,2.5&…