You dont need any plugin to make shadowmaps, just have to drop a light in your 3d scene, use all white materials on everything(literally just have to disable all the textures on your materials, you can find plugins that do that for you in one click and re-enable it the same way), not self-illuminated, bake shadowmaps and make max set them automatically in your self-illumination channel(make sure to not have multiple objects with the same material or it'll f* up) and then re-enable the textures.
You dont even need 4k reso maps(as i did sometime), 1024x1024 is more than enough. 😉
