Final Render Window - Compare and Options Tab

On the Compare and Options tab, you can compare two renders using several different methods and set additional render display options.

Compare

The following options are available:
Compare With Select one of the following:

Second Selected Image

Compares two different rendered images. Press Ctrl and select two thumbnail images to compare.

Selected Image's Output Channel

Compares the original rendered image with the image after image processing options have been applied.
Apply Image Processing Turns options set on the Image Processing tab on or off for the compare operation.
Difference Calculates the difference between each pixel value of the two images and displays the difference as a grayscale representation. Black indicates no difference between the two pixels. The shade of gray lightens as the difference increases, with white representing the maximum difference. Select one of the following:

Luminosity

Hue

Saturation

RGB

Red

Green

Blue

Difference Scale Controls the scale by which Difference is displayed. Enter a value between 1 and 10.
+/- Uses color, rather than a grayscale, to discern between positive and negative differences between pixels. Available when Difference is activated.
Show Channels in Color Shows Red, Green, and Blue channels as colored versions of themselves.

When +/- is cleared, shows only the channel color.

When +/- is selected, uses an additional color to discern between positive and negative differences.

Available when Difference is activated.
Compare Mode Select one of the following:

Wipe

The two images are overlaid and the top image (the first selected image) is wiped away, revealing the second selected image. You can select a Horizontal or Vertical wipe method.

Spotlight

The two images are overlaid and the cursor turns into a spotlight which reveals the second selected image. You can control the size of the Spotlight Radius.

Side by Side

Displays two half-width images that can be scrolled. When selected, options appear allowing you to Stack Vertically or Stack Horizontally.

Options

Display Channels Displays individual Red, Green, or Blue color channels.
Display Channels in Color Displays individual color channels as colored versions of themselves. When cleared, individual channels display as grayscale representations.
Show Transparency Background When enabled, images that contain an alpha (transparency) channel display transparent areas as a white and gray checkerboard. This option is available for images that are not high dynamic range (images loaded from your computer rather than rendered images).
Show Clipping Displays zebra stripes over overexposed areas of the image. You can use this feedback to help you adjust the white levels and tone mapping.
Max Render Images Determines the maximum number of renders displayed in the Final Render window. When the number of renders exceeds this value, the oldest render is deleted.