Photoshop Layer Style Contour Editor Explained

This article provides an overview of the Contour editor in Adobe Photoshop's Layer Style dialog, explaining how it functions as a tone curve to alter visual effects. Readers will learn the precise visual adjustments this tool performs across styles like Bevel and Emboss, Drop Shadow, Glows, and Satin, and how altering these curves reshapes light falloff, edge transitions, and surface reflectivity.

The Contour editor in Adobe Photoshop functions as an input-output mapping curve that controls the rate of transition across a layer effect's range. Instead of rendering a uniform, linear progression from 0% to 100%, the Contour curve alters how an effect transitions across its specified size, distance, or opacity. It fundamentally reshapes the cross-section of a layer style.

The Mechanics of the Curve

The Contour dialog displays a coordinate grid representing input and output:

  • Horizontal Axis (Input): Represents the distance from the edge of the object to the outer or inner boundary of the effect.
  • Vertical Axis (Output): Represents the intensity, opacity, or elevation of the effect at that specific distance.

A default straight diagonal line produces a constant, linear falloff. Raising the curve produces a brighter or more pronounced effect across the distance, dipping the curve creates a hollowed or thinner effect, and adding multiple control points produces complex multi-stage ripples, rings, or bands.

Visual Adjustments Across Different Effects

The Contour editor alters effects differently depending on the specific layer style applied:

1. Bevel and Emboss

In the Bevel and Emboss settings, the Contour editor appears in two places:

  • Contour (under Elements): Modifies the physical cross-section profile of the edge. A standard diagonal line creates a smooth chisel or slope. Curved, stepped, or peaked contours change the edge into rounded mounds, scooped valleys (coves), or multi-tiered ridges.
  • Gloss Contour (under Shading): Controls the reflectivity and specular highlights across the surface. Manipulating this curve creates the appearance of highly reflective materials such as chrome, liquid, or glass by compressing highlights and shadows into sharp, alternating bands.

2. Drop Shadows and Inner Shadows

In shadow effects, the Contour editor dictates the opacity falloff:

  • A linear contour creates an authentic, soft-edged shadow diffusion.
  • Steep or inverted curves can create hard-edged shadows, double-cast shadows, or halo-like silhouettes where the shadow fades out and then abruptly darkens again.

3. Outer Glow and Inner Glow

For glow styles, the Contour editor controls the distribution of light:

  • Adjusting the curve shifts the bulk of the light toward the outer perimeter or concentrates it tightly against the layer's edge.
  • Wave-like curves generate neon glow effects, rings of energy, or gaseous auras with multiple distinct boundaries.

4. Satin

The Satin effect relies almost entirely on the Contour editor to calculate how the inverted interior shadow wraps across the layer:

  • S-curves and multi-peak contours produce folds, glossy sheens, and liquid-like depths across the interior of the shape.
  • Inverting the contour reverses the shadow and highlight placement, shifting the perceived depth from convex to concave.

Anti-Aliasing and Corner Smoothing

Within the Contour editor, the Anti-aliased checkbox applies subtle mathematical blending to the pixels governed by the curve. Enabling this option eliminates jagged pixel stepping along complex curves, ensuring smooth tonal gradations and crisp, artifact-free visual transitions across the layer.