Viewport Filter properties

Tonemapper properties

Gamma: Controls the overall brightness of the image that appears in the 3D View. Adjusting the Gamma property can help evaluate how the model/scene appears in another environment, for example, on film or a games console.
Luminance Max: Compresses or expands the tonal range that appears in the 3D View by resetting the value used as a benchmark for white. Use with the Gamma property to adjust the contrast.
Adaption Time: Specifies the rate at which the Tonemapper refreshes the effect in the view. A higher number updates quicker than a lower number.
Adaption Epsilon: A bias setting for determining the priority for remapping the values in the 3D View.
Level Count: Specifies the amount of blur that occurs for the glare effect.
Glare Scale: Specifies the intensity of the glare effect in the 3D View. Negative values can create interesting color effects.
Glare Bias: Controls the spread of the glare effect. Increasing the bias limits the glare to highlight areas.

Depth of Field properties

Depth of Field: Specifies the width (in centimeters) for the area of sharpest focus in the 3D View. Regions outside the Depth of Field are blurred based on the Blur Amount value.
Focus Distance: Specifies the distance (in centimeters) from the viewing camera to the center of the Depth of Field area. The Focus Distance is connected to the camera. That is, as you dolly the camera back and forth, the Depth of Field also moves in relation to the object.
Blur Amount: Specifies the amount of blur outside the Depth of Field area when simulating the depth of field effect. Lower values blur areas outside the Depth of Field to a lesser degree than higher values.

Cavity Ambient Occlusion properties

Strength: Specifies the intensity of ambient occlusion. Negative values can create interesting color effects (such as hot, glowing lava) when you use a color complementary to the Shadow Color.
Sample Radius: Specifies the radius of a sampling area (in screen space). Occlusion artifacts are possible when the radius is set incorrectly in relation to the features on the model. For example, large features can be missed if the radius is set too small, or small features can be missed if the radius is set too large.
Cutoff Radius: Specifies the distance the sampling rays travel from the sampling point into the scene to determine the presence of occluding objects. Decrease this value and the Sample Radius if you do not achieve an acceptable ambient occlusion effect on small objects. In most situations, the Cutoff Radius value should be kept lower than the Sample Radius.
Shadow Color: Specifies the color of the shadows produced by the ambient occlusion effect. Click the color tile to display the Color Chooser window and edit the Shadow Color.
Quality: Good, Better, or Best specifies the number of occlusion samples that occur to improve the appearance of the ambient occlusion effect. The higher the Quality setting, the lower the overall refresh rate in the 3D View.

Ambient Occlusion properties

Screen Distance properties

Invert: Reverses the depth map effect to produce a negative image. What was white becomes black, and so on.
White Level: Determines the scale at which white values are applied to the depth map effect. The effect is an increase or decrease in the contrast of white values.
Black Level: Determines the scale at which black values are applied to the depth map effect. The effect is an increase or decrease in the contrast of black values.
Save 16 bit Image: Saves an image of the screen distance effect as it appears in the 3D View as a 16 bit RGBA TIFF image.

Non-photorealistic properties

Noise Scale: Controls the smoothness of the stroke drawn around outside edges and features on models. Has no effect when Noise Amplitude is set to 0.
Noise Amplitude: Controls the distortion of the stroke drawn along outside edges and features on models. Works with Noise Scale.
Pencil Scale: Controls the thickness of the stroke drawn along the outside perimeter of objects in the 3D View.
Fill Noise Amplitude: Controls the smoothness of the fill regions that are drawn for models in the 3D View. Increasing this value makes the fill bleed outside of the stroke region, like watercolor paint.
Fill Paper Noise Amplitude: Applies a rubbing effect on the textured background to enhance the effect of a textured paper. When Fray Strength is set to 0, this feature has no effect.
Gradient Width: Increases the buildup of the rubbing effect produced by the Fill Paper Noise Amplitude property. For use with Fill Paper Noise Amplitude and Fray Strength.
Fray Strength: Increases or decreases the effect produced by the Fill Paper Noise Amplitude property.