Provides options for moving image processing settings between the render output and the Render Display window.

• Copy From Scene - If adjustments were made to the render output options after the rendered image completes, the Copy from Scene option grabs those settings, updating the options of the Render Display window to match.

• Paste to Scene - Any adjustments made to the rendered image within the Render Display window do not apply to subsequent renders, as the Render Display window reverts to the settings of the Render Item. The Paste to Scene option copies the settings to the render output back to the scene, applying it to all subsequent renders.

• Reset - Returns all image adjustment options to their default values.

Toggles the effect of the Image Processing controls on and off, allowing you to quickly switch between the previous image and adjusted image.

Sets the exposure preset to apply to the image:

• White Level - Defines the amount of luminance (illumination brightness) that corresponds to pure white in the rendered image, adjusted with the Input White Level value.

• Photographic - Produces similar results to White Level, but uses the Film Speed (ISO) setting more familiar to photographers.

Sets the sensitivity of the film or sensor when Exposure Control is set to Photographic. Higher values simulate increased exposure time, but without any added noise.

Specifies the radiance or luminance level that corresponds to pure white in the final rendered image (a pixel color value of 1.0), when Exposure Control is set to White Level.

Higher values tend to darken the image, requiring a much brighter area to represent the whitest white, but can also be used to bring out detail in overblown areas.

Note:  To use the input level controls effectively, Clamp Colors must be disabled in the Shader Tree > Render Output sub-tab.

A non-linear luminance adjustment that applies a curve-like function to the pixels, modifying the mid-range the most while attenuating the adjustment amount for values moving toward the defined Black and White points. Values above 1.0 lighten the mid-range, while values below 1.0 darken the mid-range.

Specifies the radiance or luminance level that corresponds to pure black in the final rendered image (a pixel color value of 0.0).

Note:  To use the input level controls effectively, Clamp Colors must be disabled in the Shader Tree > Render Output sub-tab.

Sets the mapping type used to control tonal balance. Select the required type and then use the Tone Map Amount to control the range.

Controls the overall tonal balance of the rendered image, compressing the rendered dynamic range into something viewable, where shadows and highlights can reveal previously obscured details. Often, it takes a combination of settings for white level, tone mapping, and gamma to achieve the best results. For further examples, see Tone Mapping.

Dynamic range is measured as the difference between the darkest shadow to the brightest highlight in an image. Most image formats' dynamic range pale in comparison to that of the world around us. In the same way that a photographer struggles to capture all of the range our eyes can see, you may find your renders have shadow areas that are too dark, and highlight areas that are too bright. Luckily, Modo renders in full floating point accuracy, providing dynamic range well beyond what any monitor is capable of displaying.

Note:  To use the input level controls effectively, Clamp Colors must be disabled in the Shader Tree > Render Output sub-tab.

Controls the concentration or amount of color in an image independent of the luminosity of brightness. At 100%, colors are fully saturated as defined in the item's material settings. Reducing the value reduces the overall color saturation to a value of 0%, producing an image only with gray shades.

Tip:  Modo renders in full 32-bit floating point accuracy, so values above 100% increase saturation without introducing the color banding and artifacts generally associated with over-saturating images.

Adjusts the color values of the rendered image independently of the luminosity or brightness values, shifting them across the entire spectrum in a sequential fashion.

Hue values are arranged on a standard colorwheel, where a rotation of 180° inverts all the color values. For example, shifting a red color in a positive direction adjusts reds toward an orange hue, then yellow, and so on.

Introduces an overall color tint into an image. This can be purely for artistic reasons, but can also be helpful in reversing color casts introduced by image-based lighting among other things.

Define a tint color using the Target Color control and then adjust the Colorization amount to determine the strength of the color in the image. A value of 0% produces no colorization, attenuating toward 100% where the image is replaced fully by the Target Color.

Specifies the tint color when the Colorization control is set above 0%.

Setting Vignette Amount to 100% creates a physically accurate vignette simulation, a natural reduction of the brightness of an image toward the outer edges of the frame, based on the camera's focal length and film size.

Values above 100% darken the resulting vignette, and values below 100% reduce its visibility.

When enabled, two additional options display, Threshold and Radius. Adjusting these controls provides near real-time feedback in the Render Display window.

In photography, when a very bright part of an image neighbors a very dark part, the bright part appears to glow. This phenomenon is known as Bloom. Modo's Bloom simulates this effect by removing excess energy from a pixel and distributes it around to its neighbors.

Sets the lower threshold to which pixels are effected, when Bloom is enabled. When set to 100%, only the hottest specular highlights bloom, whereas at 0%, every pixel in the scene receives the effect. For examples, see Basic Render Outputs.

Note:  This control is only available when Bloom in enabled.

Sets the distance that energy is distributed, in effect controlling the size of the glow. Higher values can impart an ethereal look to the rendered image. For examples, see Basic Render Outputs.

Note:  This control is only available when Bloom in enabled.

Controls the amount of gamma applied to the rendered image, for both display and when the image is saved. It can be used as an image adjustment control to lighten or darken the image without the need to externally adjust it in an external bitmap editor.

The gamma adjustment is non-linear and affects the mid-tones of the image more than the shadows and highlights. For best results, leave the gamma value at the default 1.0.

Defines the colorspace of the rendered frame. When set to default, the colorspace definition is derived from the Scene Item settings. Changing the value here results in an override that can be set per output.

The default settings generally produce the correct results, but you can experiment as required due to the non-destructive nature of the Render Display. For more information on color management, see Color Management.

Determines which opposing images are compared:

• None - No image comparison

• "B" Slot - Two separate images are compared. Slot A is determined by the current image selected in the browser and Slot B is determined by holding the Ctrl/Cmd key and clicking on a second image slot in the browser.

A small A and B icon appears beneath each image, signifying which is which.

• "A" Slot Output - Compares passes or outputs associated with a single image, selected using the Pass and Output controls.

When the "A" Slot Output option is selected, determines which Pass to compare against the default pass.

When the "A" Slot Output option is selected, determine which Output to compare against the default output.

Toggles the effect of the Image Processing controls on and off, allowing you to quickly switch between the original image and adjusted image.

Several modes define how the two images are compared, each with additional options.

• Wipe - The images are overlaid and the top image is wiped away, revealing the lower image. Use the Wipe Method, Position, and Opacity Controls to set the wipe behavior.

• Spotlight - Reveals the B images as a circle around the pointer (move over the image to see the results). The size of the circle is determined by the Spotlight Radius control.

• Side by Side - Displays two half-width images next to each other.

When Compare Mode is set to Wipe, allows you to select Horizontal, Vertical, or Dissolve wiping.

When Wipe Method is set to Horizontal or Vertical, sets the position of the wipe widget in the viewport.

When Wipe Method is set to Dissolve, sets opacity of the top image to reveal the image underneath.

When Compare Mode is set to Spotlight, allows you to control the radius of the spotlight.

When Compare Mode is set to Side by Side, enable this control to stack the images vertically instead of horizontally.

Calculates the pixel variance between the two images and displays it as a grayscale image. Black indicates no difference between the two pixels, attenuating toward white, which indicates the maximum difference. The amount of difference displayed can be scaled using the Difference Scale.

Each of the available options displays the difference between the two images for the chosen aspect, such as the difference between the Hue of both images, or the difference of the Saturation amount. Utilizing the Difference option can be especially helpful in pinpointing subtle differences between two similar images.

Note:  This is mostly for high dynamic range images (HDR), but in some cases it provides a better indication of dramatic or subtle differences. The difference calculation is the same math used to determine the difference between two numbers (subtracting one value from the other).

Scales the amount of difference for the selected Difference option.

Note:  This control is only available when Difference is set to something other than none.

When enabled, you can drag directly over the rendered image to define the limited region area interactively. When the initial area is defined, edges and corners of the region are highlighted, allowing you to further refine the region. Click and drag the highlighted border to adjust.

If edits are made to the same scene, the area outside the defined region is used as a background to successive renders until disabled. When switching between scenes or image resolutions, the background area outside the region renders black.

Temporarily enables and disables the Edited Render Region without losing any of the settings.

Allows you to specify the total rendered region width and height manually.

All resulting rendered images are generated as standard RGB bitmap format images. For diagnostic purposes, it may be useful to see the individual Red, Green or Blue color channels of an image.