Filter Menu

Choosing a Filter menu item opens a modal dialog that lets you change settings with sliders and (for Blur) radio buttons. Each dialog has a Preview switch that’s on by default so you can view the effect immediately on the painted surface.

• Default menu: Tools menu > Viewport Canvas > Activate any paint tool or click Layers Dialog. > Layers dialog > Menu bar > Filter menu
• Alt menu: Materials menu > Create/Edit Maps > Paint Bitmap (Viewport Canvas) > Activate any paint tool or click Layers Dialog. > Layers dialog > Menu bar > Filter menu

Blur

Opens a dialog that lets you specify the amount and direction of blur to apply to the layer.

• Blur The amount of blurring to apply.
• Uniform Blurs equally in all directions.
• Horizontal Blurs horizontally only.
• Vertical Blurs vertically only.

Sharpen

Applies a sharpening effect by adjusting the contrast between pixels at edges in the image.

• Amount The degree of sharpening applied.
• Radius The distance from each affected pixel within which neighboring pixels are affected by the sharpening.
• Threshold The contrast at edge pixels required for sharpening to occur. At higher values, less sharpening is applied.

Find Edges

Emphasizes edges and de-emphasizes color and midtones. The output tends to resemble a sketch with black ink on white paper.

• Threshold The contrast at edge pixels required for edge detection to occur. At higher values, fewer midtones appear.
• Contrast The contrast at edges for detection to occur. At higher values, fewer midtones appear.

Median

Reduces image noise without affecting sharpness.

• Radius The distance within which noise reduction occurs. Lower values tend to be more effective.

Threshold

Converts a color image to black-and-white.

• Threshold At lower values, pixels tend to become white, while
• Smoothness Applies a blurring or averaging effect.
• Gradient Lower values produce high-contrast output, while higher values tend toward grayscale output.

High Pass

Emphasizes edges near sharp color transitions and de-emphasizes the remainder of the image. This can be useful for preserving image detail before using the Threshold filter (see preceding).

• Radius The area in which the filter looks for color contrast. The higher this value, the less filtration is performed.

Distort

Adds “wavy” distortion to the image.

• Offset The distance pixels move along the distorting waveforms.
• Scale The relative size of the distorting waveforms.
• Iterations The number of times the distortion is applied to the image.
• Phase The relative position of the distorting waveforms.