Comment on MMD Shader Preview 3 by Xoriu

If you still, haven't figured it out. You'll need MME (Miku Miku Effect) to load the FX file onto the model or stage. Just go in Effect Mapping and load it onto the model. To load more than one effect on a model, you right click and click on Subset-Extract. From there, load what ever you want. Some effects do come in X files as well but not all, like the shaders.