Bevel Layer

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About Bevel Layer

Bevel layer is used to create a highlight and shadow over a shape. It pretends to give some volume to the shape by adding a dark area on the opposite place of the light direction and a light area on the light direction side.

Parameters of Bevel Layer

The parameters of the Bevel Layers are:

Name	Value	Type
Z Depth	0.000000	real
Amount	1.000000	real
Blend Method	Composite	integer
Type	Fast Gaussian Blur	integer
Hi-Color		color
Lo-Color		color
Light Angle	135.00°	angle
Depth of Bevel	12.000000pt	real
Softness	6.000000pt	real
Use Luma		bool
Solid		bool

Specific Parameters for Bevel Layers

Only particular parameters of the Bevel Layer are described here. The other parameters are common for other layers and are explained separately.

The Bevel Layer produces two effects over the context of the layer that are based on the Alpha channel of each pixel of the context. Imagine that the Bevel Layer traces light rays from the light source. When the ray line finds a transition from transparent to solid it creates a light region (Hi-color). When the ray finds a transition from solid to transparent it creates a shadow region (Lo-color). The Light Angle parameter determines the source of the light. The Depth of Bevel determines how wide is the region of light or shadow created and the Softness parameter produces a feathered light or shadow region instead of a sharp one. The feather type is determined by the Type parameter and can be one of the known Blur Types.

Light Angle

Modifying the light angle changes the regions that are high lighted and darkened. It is an angle parameter and it is defined from the X positive axis counter clock wise.

Depth of Bevel

The Depth of Bevel parameter determines the width or expansion of the bevel on both sides (dark and light side). The bigger the parameter is the softer the produced bevel is.

Softness

Softness parameter controls how feathered is the bevel. Its type of feather is controlled by the Type parameter.

Use Luma

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Solid

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Samples

Here you can find some visual examples of hos does the parameters affect to the bevel. Unless specified, all parameters are the default ones:

The Blend Method has been set to Onto in the following image

File:Bevel-sample1.sifz

Here you can see a sample usage of Solid and Use Luma parameters:

File:Bevel-sample2.sifz

One usage of Solid parameter combined with Hard Light Blend Method in the resulting bevel over the gradient.

File:Bevel-solid-hardlight.sifz

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