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||V-Ray Frame Buffer|| > Layers

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Layers Menu

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Commands available for the Layers panel are located at the top of the panel. Press on the icons to see the expanded list of commands for the stacked buttons.
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Layers are applied from the bottom to the top, where the bottom is the background (BG) and the top is the foreground (FG) of the composite.

Opacity – Controls the weight of the layer. A value of 0 means no effect and a value of 1.0 means full effect.

Blend Mode – Specifies how the layer blends with the result from all layers below it:

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When adding a new layer, it is placed on top of the stack and it is considered the foreground (FG).

The result of all layers below it is considered the background (BG). Layers are applied from the bottom to the top.

Where darker and lighter pixels are mentioned below, it is in relation to mid-grey.

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Blend Mode*Description
OverwriteDisplays the current layer (FG) on top of all layers (BG) without blending. This is the default.
Normal

Blends the FG based on the alpha values of the BG.

AverageThe average of the current layer (FG) and the result from the layers below it (BG).
AddAdds the FG to the BG.
SubtractSubtracts the FG from the BG.
DivideDivides the pixel values of the FG by the BG.
DarkenCompares the FG to the BG and takes the darker pixel values of the two.
MultiplyMultiplies the FG by the BG.
Color BurnThe color of the FG is applied to darker pixels in the BG.
Linear BurnSame as Color Burn but with less contrast.
LightenCompares the FG to the BG and takes the lighter of the two.
ScreenMakes both light and dark areas lighter.
Pin LightReplaces the BG colors depending on the brightness of the FG color.
If the FG color is lighter than mid-gray, BG colors darker than the FG color are replaced and vice versa.
DifferenceCompares the pixels in the BG and FG and subtracts the darker pixels from the brighter ones.
ExclusionSame as Difference but with less contrast.
HueUses the hue from the FG , while the value and saturation are taken from the BG.
SaturationUses the saturation from the FG, while the value and hue are taken from the BG.
ColorUses the hue and saturation from the FG, while the value is taken from the BG.
ValueUses the value from the FG, while the hue and saturation are taken from the BG.
Hard Mix (8bit)Adds the FG to the BG and for each color component returns a value of 255 if the result is 255 or greater, or returns 0 if the result is less than 255.
Color Dodge (8bit)The color of the FG is applied to lighter pixels in the BG.
Linear Dodge (8bit)Same as Color Dodge but with less contrast.
Spotlight (8bit)Same as Multiply, but with twice the brightness.
Spotlight Blend (8bit)Same as Spotlight, but additionally brightens the BG.
Overlay (8bit)Darker pixels become darker where the BG is dark and brighter pixels become brighter where the BG is bright.
Soft Light (8bit)Darker pixels become darker where the FG is dark and brighter pixels become brighter where the FG is bright.
Hard Light (8bit)Spotlight is applied to pixels where the FG is dark and Screen is applied to pixels where the FG is bright.

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*  All 8-bit blend modes clamp colors to a maximum value of 1.0.

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Filmic Tonemap

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This correction allows you to control different types of mapping curves, make gamma correction and select a color space. Note that color values are mapped per channel.

Tone mapping space – The  – Specifies the color space in which where the operator is applied. Converts the image to the selected space and back, if needed. You can choose between between Linear sRGB and  and ACEScg.Log space

Type – Converts the image to log space before applying the tone mappingSpecifies the type of curves used for the tone mapping. You can choose between Linear, Hejl-Dawson, AMPAS (ACEScg), Hable, and Power Curve.

Log space – Converts the image to log space before applying the tone mapping.

Gamma – Specifies the gamma correction. It is applied before the operator.

Use blue fix – Applies an additional transformation to ACEScg primitives that results in pure blues burning out through cyan instead of magenta. Available when Tone mapping is ACEScg.

AMPAS (ACEScg)

AMPAS mode applies an approximate ACES standard curve.

Hejl-Dawson Type

Shadows – Shadow compression. Higher values darken the shadows, while also brightening the mid tones.

Highlights – Highlight compression. Higher values reduce burnout.

Hable Type

Shoulder strength – Determines how sharp the shoulder is. Higher values sharpen the shoulder, which results in an overall brighter image.

Linear strength – Determines the strength of the effect from changing Linear angle.

Linear angle – Determines the angle of the curve at the base. Higher values increase the angle.

Toe strength – Low to mid tone compression. Higher values darken the low and mid tones.

White point – The intensity, which gets mapped to 1. This parameter scales the whole curve evenly.

Power Curve Type

Toe length – Determines the range of low to mid tones that are compressed.

Toe strength – Low to mid tone compression. Higher values darken the low and mid tones.

Contrast – Higher values increase the contrast between low and high tones.

Shoulder length – Determines the range of mid to high tones that are compressed.

Shoulder strength – Mid to high tone compression. Higher values darken the mid and high tones.

White point – The intensity, which gets mapped to 1. This parameter scales the whole curve evenly.

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