>>2886595Ray-MMD does not like overlaying transparency, so objects _below_ 0.999 opacity will not be visible behind the 0.01 cube, like you can see with the glasses here—the irises have 0.95 opacity by default and require either bringing it to 0.999+ or hiding the lenses in order to be visible behind the lenses. But you don't really need that, the draw order trick works just fine if a transparent object is above the model you want to hide in the draw order. If it doesn't work, you're doing something wrong.
It's also possible to use image masks to limit an effect, but those are static compared to a model you can manipulate. Also related:
https://www.bilibili.com/read/cv18574754/ 