Many settings accept a map. Simply click the checkerboard icon on the right to select a bitmap file.
Type
Type will determine how a material is converted to V-Ray, Thea and Enscape. Depending on the chosen material type, different settings are available.
Generic is a standard material, with the most common settings.
Metal will create a fully reflective material.
Translucent is well suited for foliage, paper, etc. In V-Ray, it will create a 2sided material. Doing this in V-Ray for SketchUp after import is quite a hassle, so Transmutr simplifies the whole process by doing it directly for you.
Emissive will create a material emitting light.
Transmutr will try to assign the right type based on the material's name. For example, if the name contains "leaf", the type will be Translucent.
VRMat
VRMat is V-Ray specific. It allows you to link a .vrmat file whose content will define the V-Ray material. If Transmutr finds in the input file folder a .vrmat file matching the name of a material, this material will automatically use this *.vrmat file. Transmutr will look for inputFolder/materialName.vrmat and inputFolder/materialName/materialName.vrmat Note that due to limitations in V-Ray, the materials may not look exactly the same between applications.