I've been playing around editing textures for some video game objects. I recently discovered that I could use "Merge Down" to put a 2D image over the 3D object and translate that to the texture. My problem is, this would only add the image to the part of the object I am looking at when merging down. I am looking for a way to wrap the 2D image around the entire 3D object.
Is this even possible on Photoshop? If it's not, but it is on 3Ds Max I'd like to know how to do it there then.
I know this would be easy on a simple shape like a cylinder since I can just place the 2D image as the texture, but these objects I am working with have custom UV Maps (that I cannot reparameterize since that wouldn't work in-game), so I can't do that. And slicing the 2D image and placing it on the correct spot on the texture so it looks perfect on the 3D object is nearly impossible.
Here is the object I am trying to texture:
And here is the UV Map: