3dsmax white mold rendering method is as follows:

1 ? Assign vraymtl material to the model, diffuse reflective white, diffuse reflective mapping channel to vray dirt mapping, copy this material to the overlay material in the rendering settings, so that all models in the scene are this material.

2 ? In vray dirt mapping, turn up the dirt radius value, turn up the subdivision value, and adjust the other values to the right amount depending on the scene.