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Question by betterine · Aug 26, 2019 at 01:29 AM · c#spritesspriterenderer

How do I make a 3D GameObject have two different sprites on each side?

I have a GameObject in a 3D space, but I want it to have a 2D image on each side - kind of like Paper Mario. I used Sprite Renderer to apply a sprite. But I don't want the other side of the GameObject to be the same sprite flipped. I want it to show the back of the character (for which I already have an image).

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Answer by Stratosome · Aug 26, 2019 at 01:55 AM

Hiya!

Alright, so, I haven't actually tried it out myself yet, even though it sounds fun. This is just my current idea and maybe it'll get you somewhere. Now, you could probably do some neato stuff with shaders, but to simplify things (with minimal shader work) I suggest something like this:

You could place two sprites at the exact same position, and pretty much treat them as one (move both if they ever need to be moved, and they could even be children of some GameObject to make it easy). One sprite can have the character's/object's front sprite, and the other have the back sprite. Now, that alone isn't going to be great. You could play around with culling the back of the front sprite, and the front of the back sprite (hopefully that kind of made sense). A small amount of work would have to be done with shaders to achieve this (this may be a decent reference?). With this approach, you could manipulate the front and back sprites easily if needed.


May seem a little hacky... but I don't think it would be too bad of a solution. Perhaps someone else can suggest something cooler.

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Answer by JonPQ · Aug 26, 2019 at 07:56 PM

Use two sprites at the same position, set one's Y rotation to 180 degrees so its facing in the other direction. Now the problem is... most of the sprite shaders are double sided (that is, you can see them on both sides) Most usual 3d shaders, are one sided only. So I suggest you make a material, and put it on each sprite, and experiment with some shaders maybe some simple legacy/transparent shaders in your material, with a one-sided shader. (3d objects only draw front facing polygons, for performance, there is no pont drawing the inside / back of most objects )

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