Mari 4.5v2 docs:

Export Dialog

The Export dialog is described below with functions for how to access it. A list of the controls on the dialog can be found in the table below.

What It Does

Invoked by the export channel functions, export flattened channel functions, export layer functions, or export flattened layers functions, the Export dialog box lets you specify options for exporting channels or layers from the current Mari project, in either flattened or non-flattened states.

If you export with Small Textures set to Enabled then any patches that are entirely filled with one color (such as gray, before anything else has been painted on the patch,) are exported as small 8x8 images to save space. Mari
supports loading these 8x8 images when importing. These images are scaled up to fill the entire patch.

How to Access It

• Menubar | Channels > Export > any of the dropdown options

• Menubar | Channels > Export Flattened > any of the dropdown options

• Menubar | Layers > Export > any of the dropdown options

• Menubar | Layers > Export Flattened > any of the dropdown options

• Right-click | in Channels Palette > Export > any of the dropdown options

• Right-click | in Channels Palette > Export Flattened > any of the dropdown options

• Right-click | in Layers Palette > Export> any of the dropdown options

• Right-click | in Layers Palette > Export Flattened> any of the dropdown options

Export Dialog Fields

Control	Type	What it does	Notes
Named Files - The Named files tab does not display if your model contains more than 20 patches.
U	information	Lists the U texture coordinate for the left edge of the patch.
V	information	Lists the V texture coordinate for the bottom edge of the patch.
UDIM	information	Lists the UDIM number for the patch.
File	entry box	Specify the file location to export to.
	button	Browse to the file location you want to export the texture to.
Sequence
Layer	information	The name of the object, channel, and layer being exported.
Path	entry box, dropdown	The directory to export the files to. Type the directory, select a recent directory from the dropdown, or use the navigation controls below.
Reset To Defaults	button	Resets the path to the default location.
	button	Goes back to the previous directory.
	button	Goes forward to the next directory that you have browsed.	Only available if you have already browsed back using the back button.
	button	Goes up one level in the directory hierarchy.
	button	Creates a new folder in the current directory.
	button	Displays the contents of the directory as icons and names only.
	button	Displays the contents of the directory as a details view, with a sort option at the top of the listing.
Filter	entry box, dropdown	Lets you filter the image sequences displayed in the dialog box. As you enter the filter text, Mari updates the display to only show the image sequences that match your text.
Full	Image	Indicates whether the selected image sequence has a full set of images for the current model. That is, for each patch on the model, there is a corresponding image in the image sequence. Green if a full set of images is present, otherwise the number found vs number required (for example, 4/5) displays.
Images	information	Lists the image sequences found in the selected Path.
Start	information	First UDIM number in the selected image sequence.
End	information	Last UDIM number in the selected image sequence.
Patch Count	information	Number of image patches in the image sequence.
Frames	Information	How many frames in the image sequence.
Modified	information	Last modified date for the images in the sequence.
Template	entry box, dropdown	Sets the Template for Mari to use when gathering the names of images in the selected sequence. Variables available are: • $ENTITY - the name of the object • $CHANNEL - the name of the channel • $LAYER - the name of the layer • $NODE - the name of the node • $UDIM - the UDIM patch value • $FRAME - the animation frame number • $NUMBER - number of the file within the batch (for example, “$NUMBER of $COUNT” gives strings like “22 of 28”) • $COUNT - total number of files in the channel • $COLORSPACE - the chosen colorspace for the selected images. • $[METADATA VALUE] - any user-defined variables (for example, if a patch has a user attribute called “PROJECT”, with a value of “Project1”, Mari replaces the variable “$PROJECT” with “Project1”).	Don't use numbers in your texture name - if you do, the Import and Export dialog boxes won't recognize the sequence.
File Example	information	Displays an example of the selected template path and filename.
Formats	Information	Displays a list of supported export file formats.
Use Template For	dropdown	Specifies whether the template should be used for Only this layer or Everything that is being exported.
Export Dialog: General Controls
Colorspace	dropdown	The colorspace to which the output values are converted. Automatic is determined by the file name, size, and type of data in file. In addition to the OCIO roles and colorspace options, there are also Same as Native and Same as Working options available in the dropdown menu. These allow you to maintain the same colorspace as the one that was native to the data, or as the one you used within Mari when you were working with the data.
Small Textures	dropdown	With this option enabled, Mari exports any patches filled with a constant color as 8x8 pixel textures, no matter what resolution the patches are in Mari. Enabling Small Textures saves disk space if you're exporting a channel that hasn't been fully painted. Disabling Small Textures lets Mari always export patches at their full size (even if they haven't been painted).	Enabling Small Textures saves disk space if you're exporting a channel that hasn't been fully painted. Disable Small Textures if you want Mari to always export patches at their full size (even if they haven't been painted).
Alpha Channels	dropdown	Select Keep or Remove alpha channels when exporting textures. This can help decrease the resulting file size when exporting images that don’t need alpha channels.
Export All Patches	button	Exports images from all patches in the project.
Cancel	button	Cancels the export and closes the dialog box.