BCC Gradient

Nested Subgroup

Gradient1

Overview

Just as you can load and save filter presets, the Color Preset banner allows you to load and save gradient presets. After you apply a BCC filter and adjust the gradient parameters, you can save the parameter settings and reload them later. Several premade presets are also included. Gradient presets are compatible with any filter that uses gradients.

Gradientbanner

Function

Presets and Common Controls

BCC filters come with a library of factory installed presets plus the ability to create your own custom presets and preview them with the BCC FX Browser™.

BCC filters also include common controls that configure global effect preferences and other host-specific effect settings.

For more information about working with presets and other common controls, Click Here.

 

The Gradient color ramp provides a preview of the gradient you are creating. The Gradient Preview will not update while you drag sliders.

The Color Space menu determines whether the gradient is created in RGB, HSL, or HSV color space. Choose HSL or HSV is you want to animate the colors in the gradient while maintaining the level of saturation.

The Color 1, Color 2, Color 3, Color 4, Color 5, and Color 6 controls choose six different colors to add to the gradient. The Color 1 and Color 6 colors are always used. Each of the remaining colors has a Color On checkbox. Select this option to add the corresponding color to the gradient. Deselect this option to remove the corresponding color from the gradient.

 

Loading and Saving Presets

The Load and Save controls are available in each filter that uses a gradient. This feature allows you to save favorite gradient settings and apply them to multiple projects.

Loading Effects:

To load a previously saved gradient setting, click the “L” or Load button. A dialog box allows you to choose a preset. The saved settings are recalled and applied to your effect.

Saving Effects:

After you adjust the gradient parameters, you can save the settings by clicking the “S” or Save button. A dialog box lets you name the file. Preset names are limited to alphanumeric characters. Special characters may result in the preset being dimmed in the Load preset list. Saving a BCC setting creates a static gradient that uses the values at the first frame.

Black Point adjusts the value in the Input Channel which is treated as the pure Color 1 level in the output. All pixels whose Input Channel value is lower than the Black Point value are mapped to the Color 1 color. Increasing positive Black Point values cause more pixels to be purely Color 1 in the output. Decreasing negative values cause fewer pixels to be purely Color 1. The following illustrations show the affect of adjusting the Black Point with a simple two-color gradient from black (Color 1) to white (Color 6).

colorize.blackpoint.n75 colorize.blackpoint.0 colorize.blackpoint.75
Black Point= -75 Black Point=0 Black Point=75

White Point adjusts the value in the Input Channel which is mapped to the pure Color 6 in the output. Decreasing White Point causes more pixels to be purely Color 6 in the output.  The illustrations below show the affect of adjusting the White Point in with a simple two- color gradient from black (Color 1) to white (Color 6).

colorize.whitepoint.25 colorize.whitepoint.50 colorize.blackpoint.0
White Point=100 White Point=50 White Point=25

Negative Squeeze values compress and shift the gradient towards the left (Color 1) side. Increasing positive values compress and shift the gradient towards the right (Color 6) side.

colorize.squeeze.n75 colorize.blackpoint.0 colorize.squeeze.75
Squeeze= -75 Squeeze=0 Squeeze=75

 

Advanced Gradient Controls Parameter Group

The Loop Mode popup affects the output when either Loop Count or Gradient Offset are changed from their default values.

  • When Off is chosen, looping past the end of the gradient uses the end color. This is the default value.

  • When you choose Forward Loop the gradient loops back to Color 1 after it passes Color 6. You can increase Loop Count to set the number of loops or change Gradient Offset to move the mapping through this loop.

  • When you choose Back & Forth Loop, the color mapping goes from 1 to 6 to 6 to 1, etc.

  • Note: the advanced group is not present in all BCC filters.

Loop Count sets the number of times that the gradient loops. Values less than one use less of the gradient, and negative values loop backwards, which will only have a different appearance from a positive value if Gradient Offset is not set to 0. Set Crossfade End Colors to a value other than zero when you use Loop Count. This will prevent the rendered image from jumping.

Gradient Offset offsets the starting point of the gradient. This can be animated to create palette-shifting effects. A value of 100 offsets the gradient by one full cycle. Since the gradient loops back and forth, setting Gradient Offset to 100 or 300 simply reverses the direction of the gradient. Set Crossfade End Colors to a value other than zero when you use Gradient Offset. This will prevent the rendered image from jumping.

Color Ease adjusts the softness of the transitions between pure colors in the gradient. Increasing positive values cause the transitions to be more abrupt. Decreasing negative values soften the transitions.

colorize.colorease.n100 colorize.colorease.100
Color Ease= -100 Color Ease=100

 

Gradient HSL Parameter Group

Hue cycles the colors in the gradient around the color wheel in the HSL color space.

Saturation adjusts the intensity of each color’s hue in the gradient. Negative values desaturate the gradient, while positive values increase the saturation of the gradient.

Lightness controls the brightness of the colors in the gradient. Higher values lighten the colors, while lower values darken the colors.


Category:

BCC Film Style

BCC Particles

BCC Color & Tone

BCC Perspective

BCC Perspective

BCC Licensing

BCC Obsolete

BCC Key & Blend

BCC Obsolete

Nested Subgroup

BCC Art Looks

BCC Licensing

BCC Time

Nested Subgroup

BCC Image Restoration

BCC Transitions

BCC Blur & Sharpen

BCC Transitions

BCC Obsolete

BCC Textures

BCC Color & Tone

BCC Image Restoration

BCC Warp

BCC Art Looks

BCC Transitions

BCC Art Looks

BCC Art Looks

BCC Stylize

BCC Textures

BCC Art Looks

BCC Transitions

BCC Key & Blend

BCC Key & Blend

BCC Textures

BCC Textures

BCC Color & Tone

BCC Stylize

BCC Color & Tone

BCC Color & Tone

BCC Obsolete

BCC Color & Tone

BCC Stylize

BCC Transitions

BCC Particles

Uncategorized

Uncategorized

Nested Subgroup

BCC Key & Blend

BCC Key & Blend

BCC Transitions

BCC Match Move

BCC Match Move

BCC Color & Tone

BCC Transitions

BCC Transitions

BCC Transitions

BCC Transitions

BCC Transitions

BCC Perspective

BCC Warp

BCC Transitions

BCC Perspective

BCC Stylize

BCC Transitions

BCC Obsolete

BCC Film Style

BCC Obsolete

BCC Blur & Sharpen

BCC Warp

BCC Stylize

BCC Image Restoration

BCC Image Restoration

BCC Image Restoration

BCC Perspective

BCC Perspective

BCC Key & Blend

BCC Stylize

BCC Lights

Uncategorized

BCC Stylize

BCC 3D Objects

BCC 3D Objects

BCC 3D Objects

BCC Film Style

BCC Transitions

BCC Film Style

BCC Perspective

BCC Blur & Sharpen

BCC Film Style

BCC Obsolete

BCC Obsolete

BCC Film Style

BCC Obsolete

BCC Obsolete

BCC Image Restoration

BCC Transitions

BCC Textures

BCC Browser

BCC Blur & Sharpen

BCC Lights

BCC Lights

BCC Lights

BCC Stylize

BCC Obsolete

Nested Subgroup

BCC Textures

BCC Transitions

BCC Stylize

BCC Art Looks

BCC Color & Tone

BCC Color & Tone

BCC Time

BCC Time

BCC Transitions

BCC Lights

BCC 3D Objects

BCC Stylize

BCC Obsolete

BCC Transitions

BCC Image Restoration

BCC Transitions

BCC Lights

BCC Obsolete

BCC Transitions

BCC Transitions

BCC Transitions

BCC Transitions

BCC Blur & Sharpen

BCC Obsolete

BCC Color & Tone

BCC Lights

BCC Transitions

BCC Obsolete

BCC Lights

BCC Transitions

BCC Key & Blend

BCC Obsolete

BCC Lights

BCC Key & Blend

BCC Key & Blend

BCC Transitions

BCC Time

BCC Image Restoration

BCC Key & Blend

BCC Film Style

BCC Match Move

BCC Key & Blend

BCC Key & Blend

BCC Art Looks

BCC Stylize

BCC Textures

BCC Warp

BCC Stylize

BCC Blur & Sharpen

BCC Image Restoration

Nested Subgroup

Nested Subgroup

Nested Subgroup

Nested Subgroup

Nested Subgroup

Nested Subgroup

Nested Subgroup

Nested Subgroup

Nested Subgroup

BCC Stylize

BCC Transitions

BCC Transitions

BCC Color & Tone

BCC Obsolete

BCC Textures

BCC Image Restoration

BCC Time

BCC Image Restoration

BCC Particles

Uncategorized

Uncategorized

Uncategorized

Uncategorized

BCC Perspective

BCC Perspective

BCC Particles

BCC Particles

BCC Particles

BCC Transitions

BCC Particles

BCC Art Looks

BCC Particles

Nested Subgroup

Nested Subgroup

BCC Image Restoration

Nested Subgroup

BCC Warp

BCC Art Looks

BCC Time

BCC Key & Blend

BCC Key & Blend

BCC Stylize

BCC Transitions

BCC Blur & Sharpen

BCC Blur & Sharpen

BCC Transitions

BCC Particles

BCC Lights

BCC Transitions

BCC Lights

BCC Lights

BCC Lights

BCC Lights

BCC Lights

BCC Lights

BCC Lights

BCC Lights

BCC Transitions

BCC Stylize

BCC Image Restoration

BCC Image Restoration

BCC Textures

BCC Lights

BCC Key & Blend

BCC Transitions

BCC Transitions

BCC Stylize

BCC Stylize

BCC Transitions

BCC Transitions

BCC Warp

BCC Transitions

BCC Textures

BCC Obsolete

BCC Color & Tone

BCC Stylize

BCC Stylize

BCC Obsolete

BCC Image Restoration

BCC Particles

BCC Particles

BCC Perspective

BCC Transitions

BCC Key & Blend

BCC Transitions

BCC Blur & Sharpen

BCC Lights

BCC Art Looks

BCC Lights

BCC Obsolete

BCC Textures

BCC Textures

BCC Obsolete

BCC Transitions

BCC Time

BCC Transitions

BCC Art Looks

BCC Transitions

BCC Time

BCC 3D Objects

BCC Time

BCC Time

BCC Color & Tone

BCC Transitions

BCC Warp

BCC Warp

BCC Transitions

BCC Film Style

BCC Key & Blend

BCC 3D Objects

BCC Blur & Sharpen

BCC Image Restoration

Uncategorized

BCC Transitions

BCC Warp

BCC Textures

BCC Time

BCC Stylize

BCC Warp

BCC Color & Tone

BCC Film Style

BCC Transitions

BCC VR

BCC VR

BCC VR

BCC VR

BCC VR

BCC Warp

BCC Art Looks

BCC Transitions

BCC Warp

BCC Textures

BCC Particles

BCC Image Restoration

BCC Match Move

BCC Textures

BCC Textures

BCC Obsolete

BCC Obsolete

BCC Obsolete

BCC Blur & Sharpen

BCC Image Restoration

BCC Blur & Sharpen

BCC Transitions

BCC Blur & Sharpen

BCC Transitions

BCC Blur & Sharpen

BCC Key & Blend

BCC Transitions

BCC Transitions

BCC Blur & Sharpen

BCC Transitions

BCC Transitions

BCC Color & Tone

BCC Film Style

BCC Transitions

BCC Film Style

BCC Film Style

BCC Color & Tone

BCC Color & Tone

BCC Lights

BCC Transitions

BCC Image Restoration

BCC Transitions

BCC Stylize

BCC Transitions

BCC Transitions

BCC Blur & Sharpen

BCC Transitions

BCC Blur & Sharpen

BCC Transitions

BCC Film Style

BCC Stylize

BCC Lens

BCC Lights

BCC Color & Tone

BCC Film Style

BCC Art Looks

BCC Lens

BCC Optical Diffusion

BCC Lights

BCC Lens

BCC Grads and Tints

BCC Art Looks

BCC Key & Blend

BCC Art Looks

BCC Grads and Tints

BCC Grads and Tints

BCC Film Style

BCC Film Style

BCC Image Restoration

BCC Image Restoration

BCC Color & Tone

BCC Lens

BCC Optical Diffusion

BCC Blur & Sharpen

BCC Color & Tone

BCC Optical Diffusion

BCC Optical Diffusion

BCC Grads and Tints

BCC Key & Blend

BCC Color & Tone

BCC Lights

BCC Film Style

BCC Optical Diffusion

BCC Optical Diffusion

BCC Grads and Tints

BCC Lights

BCC Lights

BCC Lights

BCC Color & Tone

BCC Optical Diffusion

BCC Art Looks

BCC Color & Tone

BCC Key & Blend

BCC Lights

BCC Art Looks

BCC Color & Tone

BCC Lights

BCC Lens

BCC Lights

BCC Lights

BCC Film Style

BCC Color & Tone

BCC Key & Blend

BCC Optical Diffusion

BCC Grads and Tints

BCC Optical Diffusion

BCC Art Looks

BCC Key & Blend

BCC Key & Blend

BCC Lights

BCC Grads and Tints

BCC Color & Tone

BCC Optical Diffusion

BCC Lens

BCC Grads and Tints

BCC Lights

BCC Lights

BCC Lights

BCC Color & Tone

BCC Grads and Tints

BCC Color & Tone

BCC Optical Diffusion

BCC Grads and Tints

BCC Optical Diffusion

BCC Grads and Tints

BCC Lights

BCC Grads and Tints

BCC Textures

BCC Film Style

BCC Grads and Tints

BCC Perspective

BCC Transitions

BCC Lens

BCC Art Looks

Title Studio

Title Studio

Title Studio

Title Studio

Title Studio

Title Studio

Title Studio

BCC 3D Objects

Tutorial

Tutorial

Tutorial

Tutorial

Tutorial

Tutorial

Tutorial

Tutorial

Tutorial

Tutorial

Tutorial

Title Studio

Title Studio

Title Studio

Title Studio

Title Studio

Title Studio

Title Studio

Title Studio

Title Studio

Title Studio

Title Studio

Title Studio

Tutorial

Title Studio

Title Studio

Title Studio

Title Studio

Title Studio

Title Studio

Title Studio

Title Studio

Title Studio

Tutorial

Effect:
BCC+X-Ray
BCC+Wide Angle Lens
BCC+Video Glitch Dissolve
BCC+Transform
BCC+Tint
BCC+Three Strip
BCC+Textures
BCC+Sunset
BCC+Streaks
BCC+Split Tone
BCC+Split Field
BCC+Skin Tone
BCC+Silk
BCC+Shadows/Highlights
BCC+Sepia
BCC+Selective Saturation
BCC+ReLight
BCC+Reflector
BCC+Rays
BCC+Radial Tint
BCC+Radial Exposure
BCC+Rack Focus
BCC+Polarizer
BCC+Photographic
BCC+Overexpose
BCC+Optical Dissolve
BCC+Non-Additive Mix
BCC+Night Vision
BCC+Net
BCC+ND Gradient
BCC+Mist
BCC+Math Composite
BCC+Low Contrast
BCC+Looks
BCC+Light
BCC+Lens Flare
BCC+Lens Distortion
BCC+Key Light
BCC+Kelvin
BCC+Infrared
BCC+Ice Halos
BCC+Holdout Composite
BCC+High Contrast
BCC+Harris Shutter
BCC+Halo
BCC+Grade
BCC+Glow Edges
BCC+Glow Darks
BCC+Glow
BCC+Gels
BCC+FX-Editor
BCC+Frost
BCC+Fog
BCC+Film Stocks
BCC+Eye Light
BCC+Enhancing
BCC+Edge Composite
BCC+Dual Gradient
BCC+Double Fog
BCC+Diffusion
BCC+Develop
BCC+Detail
BCC+Depth of Field
BCC+DeFringe
BCC+Defog
BCC+DeBlock
BCC+DeBand
BCC+Day for Night
BCC+Cross Processing
BCC+Colorize Gradient
BCC+Color Spot
BCC+Color Shadow
BCC+Color Paste
BCC+Color Infrared
BCC+Color Gradient
BCC+Chromatic Aberration
BCC+Chroma Bands
BCC+Center Spot
BCC+Camera Shake
BCC+Borders
BCC+Bleach Bypass
BCC+Black and White
BCC+Ambient Light
BCC+ Vignette
BCC+ Video Glitch
BCC+ Two Strip
BCC+ Spin Blur Dissolve
BCC+ Smear Blur
BCC+ Rays Dissolve
BCC+ Radial Blur
BCC+ Rack Focus Dissolve
BCC+ Prism Dissolve
BCC+ Prism
BCC+ Multi-Star Dissolve
BCC+ Magic Sharp
BCC+ Light Leaks Dissolve
BCC+ Light Leaks
BCC+ Haze
BCC+ Fluorescent
BCC+ Flashing
BCC+ Film Grunge
BCC+ Film Glow Dissolve
BCC+ Film Glow
BCC+ F-Stop
BCC+ Dissolve
BCC+ Directional Blur Dissolve
BCC+ Directional Blur
BCC+ Cross Zoom Dissolve
BCC+ Crash Zoom Dissolve
BCC+ Composite
BCC+ Channel Blur YUV
BCC+ Channel Blur Dissolve
BCC+ Channel Blur
BCC+ Camera Shake Dissolve
BCC+ Blur
BCC+ Beauty Studio
BCC Z-Blur
BCC Z Space III
BCC Z Space II
BCC Z Space I
BCC Wooden Planks
BCC Wood Grain
BCC WitnessProtection
BCC Wire Remover
BCC Wild Cards
BCC Weave
BCC Wave
BCC Water Waves Dissolve
BCC Water Color
BCC Warp
BCC VR Sharpen
BCC VR Reorient
BCC VR Insert
BCC VR Flicker Fixer
BCC VR Blur
BCC Vignette Wipe
BCC Vignette
BCC VideoScope
BCC Video Morph
BCC Video Glitch
BCC Velocity Remap
BCC Veined Marble
BCC Vector Displacement
BCC Vector Blur Dissolve
BCC User Guide
BCC UpRez
BCC Unsharp Mask
BCC Type On Text
BCC Two Way Key
BCC Two Strip Color
BCC Twister
BCC Twirl
BCC Turbulence
BCC Tritone Dissolve
BCC Tritone
BCC Trails Basic
BCC Trails
BCC Title Studio
BCC Time Displacement
BCC Tile Wipe
BCC Tile Mosaic
BCC Textured Wipe
BCC Temporal Blur
BCC Swish Pan
BCC Super Blend
BCC Steel Plate
BCC Stars
BCC Star Matte
BCC Stage Light
BCC Spray Paint Noise
BCC Spotlight
BCC Spiral Blur
BCC Spin Blur Dissolve
BCC Spill Remover
BCC Sphere Transition
BCC Sphere
BCC Sparks
BCC Snow
BCC Smooth Tone
BCC Sequencer
BCC Scatterize
BCC Scanline
BCC Safe Colors
BCC Rough Glow
BCC Rock
BCC Ripple Dissolve
BCC Ripple
BCC Rings Wipe
BCC Ribbon Wipe
BCC RGB Pixel Noise
BCC RGB Edges
BCC RGB Displacement Dissolve
BCC RGB Blur Dissolve
BCC RGB Blend
BCC Reverse Spotlight
BCC Reptilian
BCC Remover
BCC Reframer
BCC Reflection
BCC Rectangular Wipe
BCC Rays Wedge
BCC Rays Textured
BCC Rays Streaky
BCC Rays Ripply
BCC Rays Ring
BCC Rays Radiant Spotlight
BCC Rays Radiant Edges
BCC Rays Puffy
BCC Rays Dissolve
BCC Rays Cartoon
BCC Rain
BCC Radial Wipe
BCC Radial Blur
BCC Pyramid Blur
BCC Prism Dissolve
BCC Prism
BCC Primatte Studio
BCC Presets
BCC Premult
BCC Preferences
BCC Posterize Time
BCC Posterize
BCC Polar Displacement
BCC PixelChooser – Legacy
BCC Pixel Fixer
BCC Pixel Chooser
BCC Pinning Controls
BCC Pin Art 3D
BCC Pencil Sketch
BCC Particle System
BCC Particle Illusion Dissolve
BCC Particle Illusion
BCC Particle Emitter 3D
BCC Particle Array 3D
BCC Pan And Zoom
BCC Page Turn
BCC Overview in Resolve
BCC Overview in FCP
BCC Overview in Avid
BCC Overview in Adobe
BCC Organic Strands
BCC Optical Stabilizer
BCC Optical Flow
BCC Noise Reduction
BCC Noise Map 2
BCC Noise Map
BCC MultiTone Mix
BCC Multi Stripe Wipe
BCC Multi Stretch Wipe
BCC Multi Shadow
BCC Motion Tracker Vegas
BCC Motion Tracker Resolve
BCC Motion Tracker Red
BCC Motion Tracker PRM
BCC Motion Tracker Motion
BCC Motion Tracker FCP
BCC Motion Tracker Avid
BCC Motion Tracker AE
BCC Motion Tracker
BCC Motion Key
BCC Motion Blur
BCC Mosaic
BCC Morph
BCC Mixed Colors
BCC Misalignment
BCC Median
BCC Matte Cleanup
BCC Matte Choker
BCC Match Move
BCC Match Grain
BCC Make Alpha Key
BCC Magic Sharp
BCC Looper
BCC Linear Wipe
BCC Linear Luma Key
BCC Linear Color Key
BCC Lightning
BCC Light Zoom
BCC Light Wrap
BCC Light Wipe
BCC Light Sweep
BCC Light Matte
BCC Light Leaks Dissolve
BCC Light Leaks
BCC Levels Gamma
BCC Lens Transition
BCC Lens Shape
BCC Lens Flash
BCC Lens Flare Spiked
BCC Lens Flare Round
BCC Lens Flare Dissolve
BCC Lens Flare Advanced
BCC Lens Flare 3D
BCC Lens Distortion Wipe
BCC Lens Correction
BCC Lens Blur Dissolve
BCC Lens Blur
BCC LED
BCC Layer Deformer
BCC Laser Beam
BCC Kaleida Dissolve
BCC Jitter Basic
BCC Jitter
BCC Invert Solarize
BCC Hue-Sat-Lightness
BCC Halftone
BCC Grunge
BCC Grid Wipe
BCC Granite
BCC Gradient
BCC Glow Matte
BCC Glow Alpha Edges
BCC Glitter
BCC Glint
BCC Glare
BCC Gaussian Blur
BCC FX Browser
BCC Fractal Noise
BCC Flutter Cut
BCC Flicker Fixer
BCC Fire
BCC Film Process
BCC Film Grain
BCC Film Glow Dissolve
BCC Film Glow
BCC Film Damage
BCC Fast Lens Blur
BCC Fast Flipper
BCC Fast Film Process
BCC Fast Film Glow Dissolve
BCC Fast Film Glow
BCC FAQ
BCC Extruded Text
BCC Extruded Spline
BCC Extruded EPS
BCC Emboss
BCC Effects List
BCC Edge Lighting
BCC Edge Grunge
BCC Edge Cleaner
BCC DVE Basic
BCC DVE
BCC Dv Fixer
BCC Dust and Scratches
BCC Dropout Fixer
BCC Drop Shadow
BCC Displacement Map
BCC Directional Blur
BCC DeNoise
BCC Deinterlace
BCC DeGrain
BCC Damaged TV Dissolve
BCC Damaged TV
BCC Cylinder
BCC Curl Dissolve
BCC Curl
BCC Cube
BCC Cross Zoom
BCC Cross Melt
BCC Cross Glitch
BCC Criss-Cross Wipe
BCC Crash Zoom Dissolve
BCC Correct Selected Color
BCC Corner Pin Studio
BCC Corner Pin
BCC Composite Dissolve
BCC Composite Choker
BCC Composite
BCC Compare Mode
BCC Common Controls - Avid
BCC Common Controls
BCC Comet
BCC Colorize Glow Dissolve
BCC Colorize Glow
BCC Colorize
BCC Color Palette
BCC Color Match
BCC Color Correction
BCC Color Choker
BCC Color Balance
BCC Clouds
BCC Cloth
BCC Chroma Key Studio
BCC Chroma Key
BCC Checker Wipe
BCC Charcoal Sketch
BCC Caustics
BCC Cast Shadow
BCC Cartooner
BCC Cartoon Look
BCC Burnt Film
BCC Bump Map
BCC Bulge
BCC Broadcast Safe
BCC Brightness-Contrast
BCC Brick
BCC Boost Blend
BCC Blur Dissolve
BCC Blur
BCC Blobs Wipe
BCC Beauty Studio
BCC Beat Reactor Integrated
BCC Beat Reactor
BCC AVX Licensing
BCC Artists Poster
BCC Apply Modes
BCC Alpha Spotlight
BCC Alpha Process
BCC Alpha Pixel Noise
BCC AE Licensing
BCC 3D Image Shatter
BCC 3D Extruded Image Shatter
BCC 3 Way Color Grade
BCC 2D Particles
BCC+ Atmospheric Glow