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.
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/materialName.vrmat Note that due to limitations in V-Ray, the materials may not look exactly the same between applications.