Is there a way to replace a sprite in a spritesheet while maintaining "Bind Poses"?

I managed to rig my 2d character up with bones and have her animating. However, now I want to try to change the colour of her clothing. I tried importing the new clothing as a png and replacing the Sprite field of one of the Sprite Renderers in the hierarchy with the new sprite, but now the Sprite Skin component gives me the warning "Sprite has no Bind Poses", and the sprite is being rendered with no mesh deformation at all. Is there a way to swap out images without losing the bind pose information (still a bit unclear of what that is exactly)?

 

Hello,

Any way to do this in code during run-time?
Where in the sprite are the bind poses saved and how can I copy them to a different sprite?

 

Hello @yuch3n

What about just replacing the sprite texture itselft for the new one?

 

https://forum.unity.com/threads/changing-animation-sprites.213431/

this thread has video at min 20:00 with C# script code used to swap out your original sprite sheet for another. The only issue I see here is the number of sprites within your sprite sheet I believe all your sprite sheets need to match in quantity of individual sprites within the sheet... unity loads them instead of your originals and it is all contingent upon the naming structure of the sprites within the sprite sheet.

So if your new sprite sheet has more sprites like other dangling accessories or an extra arm etc. I don't believe this method will work... or at least I haven't found the workaround yet.

 

I don't understand Why I should copy the rig. According to the manual: "

1. Add the Sprite Library component to the same GameObject, and assign the new Sprite Library Asset set up in step 3 to the Sprite Library Asset box.
   
   
2. Add the Sprite Resolver component to the same GameObject.
   " and so on...
   I have firstly rigged my character, then I did what I cited from the manual and then I switched a body part, getting Sprite has no binding... WHY? How solve it? Why doing like the manual is not working?

 

@LeleUnity did you find a solution?

 

In order for SpriteSwap with SpriteSkin, the Sprites that is swapped in needs to have the same number of bones as the original Sprite.

If you look at the Rikr examples, all the swappable Sprites are rigged with the same number of bones.

So in your particular case, you will need to rig the 'face swap' sprite with a single bone (just like you did with the 'face' sprite in cipresso).

We recognise this is not ideal at the moment, and we are still looking for a solution for this.

For the case of Weapons, if the weapons does not need to deform (like a Sword or a Shield) it can placed in the SceneView so that it follows the transform of the body part.

 

I'm a little late to help the OP, but I have some advice that can help others. You can drive sprite colour using some basic colour blending math in the node-based shader editor thingy (sorry, I'm not a regular Unity guy, come from a 3D CG background though). Basically make the default sprite white in the places you want to drive, then multiply by colour, and use RGB mattes to isolate the places you want to use. You can even use overlay math with lighter and darker areas to keep lighter and darker tones. - this is not a tech example, but a colleague and I recently did it here:

All those characters were sprites on bones with user-selected colour for 3 key items of clothing.

 

Cool! My use case was a bit more complicated because we wanted to swap out the clothing type entirely, but this is a great way to add variety even without that.

 

could you show the code for that?

 

Still no luck?

 

In our case, we are downloading the assets from the server and creating a sprite atlas on runtime. These assets do not have any Bind Poses, hence the sprite swapping isn't functioning. Is there a way to create Bind Poses on runtime? Been using Sprite Renderer and Sprite Skin since the game is 2D but if the API is not there also can switch to SkinnedMeshRenderer.