The Config is for setting up the export configuration of the texture files. You can change the sampling resolution (how many voxels are sampled from the planet) and scale reduction for each texture type. This is also where you can set the color, gloss, and additive values for each voxel so that the exporter knows how to interpret each voxel that in finds on the planet.

Any changes you make to the Config can be reloaded in the game without exiting/reloading the world by typing "/ReloadConfig" in the chat.

Go to the save folder for the world and look for the Config.xml inside of the Storage folder (...\Roaming\SpaceEngineers\Saves\<SteamId>\<SaveGameName>\Storage\3350589349.sbm_PlanetUnwrapper\Config.xml).

Open the Config.xml file. Set the desired texture export width and height (<ExportWidth> and <ExportHeight>). Values should be powers of 2 (i.e. 1024, 2048, 4096, 8192, etc.) and the width should generally be double the height.

(Optional) If the mod planets use any modded voxels on their surface, you will need to set the visual settings for the new voxels under the <ModdedVoxelInfoList>. The X, Y, Z color values are between 0 and 1 and map to R, G, B for the color that the voxel will appear in the exported colormap texture. There are also <VoxelGloss> and <VoxelAdditive> values which control the gloss value for the voxel (shows up in the exported normal/gloss map) and the additive value (shows up in the additive map).

It will likely take several iterations to get the values for new voxels to look right in game, so you may need to go through the flow from this step onward a few times.

NOTE: Any custom voxels will default to appearing magenta if they are not configured, so keep an eye out for any magenta pixels in the cm texture.