In the Workspace, it is unclear how does Metashape read the Camera thermal tiff files. But under Orthomosaic it is stated as a "1 bands, uint 16"
In Tools, there is Set Raster Transform Pallete which leads to the Raster Calculator, and Color Palette, I don't think you meant that!?
But under Tools, there is also Set Primary Channel, and I can choose between Default and Channel 1- LWIR, is that what you meant?
I am confused!
When you write ". Also using this dialog you can define only single band output (should be used in combination with Raster Transform -> Index Value in the Export Orthomosaic dialog)." do you mean the Set Raster Transform?
I am using Metashape 1.5.5