iMMERSE Pro: ReGrade

iMMERSE Pro: ReGrade is a color-correction suite designed to be on par with standard professional tools, effectively removing the step of toggling between a color-correction software and the game to finish editing, making it all real-time and hassle-free.

While there is no correct values and usage of this shader, people familiarized with Photography, color theory and related areas will make the best usage. However, even people with no experience can get great results by looking at the changes made being shown instantly.

Color Operations and Slots

At first, you should notice lots of drop-down boxes in the section “Color Operations.” This tells the shader what color operation is applied at each step. Think of it like building blocks, with the first being the bottom layer and the last being the top layer. You have 9 slots available, and the following options can be applied in any order as the user desires or needs:

  • Levels: Adjusts the black and white points of the image, effectively controlling the contrast and brightness range.

  • Adjustments: Provides general color and overall image changes, useful for broad adjustments.

  • Lift Gamma Gain: Allows you to tweak the “Lift” (shadows), “Gamma” (midtones), and “Gain” (highlights) levels of the image, offering detailed control over different brightness ranges.

  • Calibration: Allows you to modify the default values for color hues and layers, ensuring accurate color representation.

  • Color Remapping: Enables direct changes to the colors of the image, often used for creative color effects.

  • Tone Curves: Adjusts the tones of the exposed (bright) and unexposed (dark) parts of the image, providing precise control over the tonal range.

  • Split Toning: Allows you to change the colors of the tones in the exposed (highlights) and unexposed (shadows) parts of the image separately.

  • Color Balance: Adjusts the colors in the shadows, midtones, and highlights of the image, providing detailed color correction beyond just exposure adjustments.

  • Special Transforms: Offers more “artistic” changes to the scene’s brightness and light levels, allowing for creative and unconventional effects.

Levels

  • Bypass Levels: Effectively disables the changes made in that layer.

  • Black Level In: Changes where the black levels start.

  • White Level In: Changes where the white levels start.

  • Black Level Out: Changes where the black levels end.

  • White Level Out: Changes where the white levels end.

Adjustments

  • Bypass Adjustments: Disables the changes made in that layer.

  • Contrast: Changes the entire image’s contrast.

  • Exposure: Changes the entire image exposure. Exposure is how much light the lens is absorbing, with higher values making the image brighter and lower values making the image darker.

  • Gamma: Changes the brightness of the image.

  • Filmic Gamma: Changes the brightness of the dark points of the image.

  • Saturation: Changes how much the colors are saturated in the image.

  • Vibrance: Changes how vibrant and colorful the colors are in the image.

Lift, Gamma and Gain

  • Bypass Lift Gamma Gain: Disables the changes made in that layer.

  • Lift Gamma Gain Mode: Changes the way the calculations for Lift, Gamma, and Gain work, with 2 standards available:
    • American Society of Cinematographers (ACES)
    • DaVinci Resolve

  • Lift: Changes the black levels of the image. If set to non-grey values, it will also change the color.

  • Gamma: Changes the midtones of the image. If set to non-grey values, it will change the overall temperature of the image.

  • Gain: Changes the white levels of the image. If set to non-grey values, it will change the color of the bright parts of the image.

Calibration

  • Bypass Calibration: Disables the changes made in that layer.

  • Color Temperature: Changes the white balance/temperature of the entire image.

  • Lab A Offset: Changes the magenta/green balance of the image colors.

  • Lab B Offset: Changes the orange/blue balance of the image colors.

  • R G B Primary Mode: Changes how the color changing behavior works, with 3 methods available:
    • ReGrade Legacy: Mimics the old ReGrade shader version.
    • Barycentric: Uses a method based on barycentric coordinates to adjust the color balance, providing unique and precise control over color blending.
    • Hue Based: Adjusts colors based on their hue, allowing for intuitive and natural color changes.

  • R G B Primary Hue: Changes the hue offset of each color channel (red, green, and blue).

  • R G B Primary Saturation: Changes the hue saturation value of each color channel (red, green, and blue).

Color Remapping

Color remapping allows the user to change the color values of each of the colors in the image, giving more control over the overall color scheme.

The parameters dictate changes to each of the colors (red, orange, yellow, green, aqua, blue, and magenta), separating it by Hue (first value), Saturation (second value), and Color Value (third value).

Tone Curve

  • Shadows: Changes the image’s shadow brightness.

  • Darks: Changes the image’s dark points brightness.

  • Lights: Changes the image’s bright points brightness.

  • Highlights: Changes the image’s highlight points brightness.

  • Dark Wash Range: Changes how much the dark points wash/bleach the colors.

  • Dark Wash Intensity: Changes how intense the bleaching of the colors is.

Split Toning

  • Split Mode: Changes which parts of the image’s curve will be adjusted, allowing you to pick between shadows/highlights and grey/saturated colors.

  • Tint A: Changes the tint/grey value of the first parameter.

  • Tint B: Changes the tint/grey value of the second parameter.

  • Balance: Changes which side will be more intense/prevalent. A lower value prioritizes the first value, while a higher value prioritizes the second value.

  • Blend Mode: Changes how these adjustments are mixed into the image, with options being “Soft Light” and “Overlay.”

Color Balance

Color balance changes the color brightness and saturation of the image’s lighting. They are split into Dark, Highlights, and Midtones.

Special Transforms

  • Bleach Bypass (Gamma Corrected): Controls the bleaching effect while taking gamma into consideration.

  • Gamma on Luma - Chroma: Controls the gamma level on the colors and luminosity.

Vignette and Utility

  • Mechanical Vignette: Radius: Changes the vignette radius on the image.

  • Mechanical Vignette: Blurriness: Changes how out-of-focus the outer part of the vignette is on the image.

  • Mechanical Vignette: Shape: Changes the shape of the vignette, with 0 being circular and higher values creating more anamorphic-looking shapes.

  • Sensor Vignette: Scale: Changes how much of the vignette is visible on the image.

  • Vignette Blending Mode: Changes how the vignette will be blended on the image.

    • HDR simulation: Focuses on the brightness and color levels, blending with those to preserve tones.
    • Standard: Places the vignette over the image.