Cfuller

I know the mod has been done and I appreciate the fine work the person has done on it. Namely Nazari for his cage system. I'm curious on how to actually make the models has a transparent texture. I have been fiddling with blender and it does the transparency, but never shows up in KSP. What would be easier to use to do this? Would it be better with Unity or Blender. I want to learn about how to perform this skill. I would appreciate any help or comments. Thanks