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i'm new to blender. I'm a bit confused on the concept of multiple uv mapping.

My workflow: I made an object, a plane, and I wanted to assigned different materials and UV maps for the cockpit and the body.

  • I made the seam
  • Assigned each materials to its corresponding part (the cockpit and body)
  • Unwrapped the cockpit
  • Create new uv map
  • Unwrapped the body

but as I select all, the uv map on the "body" still consist of the body itself and the cockpit enter image description here Then when I added texture and using the body and the texture overlapped.

What i want is different uv map and different image texture for each part. Please help I've been stucked with this problem for 3 days..

Update
I've tried to separate the object, made its own uv maps for the body and the cockpit, and I joined them again. But then each uv map only show the texture assigned to it and not both applied/showed in object mode/texture paint
enter image description here
and when I exported it to obj file and open it on papercraft program, the texture shown is the uv map that set as active for rendering

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  • $\begingroup$ Welcome to BSE. Make two materials (body and cockpit), one UV map : mark a seam at the materials limit. Unwrap. Assign the needed faces to each material. Set a texture per material. Adjust each of your UV map part to each texture (they can overlap but each part will be used by one material). $\endgroup$
    – lemon
    Jul 17 '16 at 10:55
  • $\begingroup$ May work (to try) : duplicate the object. Remove the second UV map from the original, remove the first UV map from the copy. Rename the UV map of the copy with the same name as the first UV map. Join original and copy. Remove double vertices. You may now have all in a single UV map and at the same place (not tested, so make copies before trying). $\endgroup$
    – lemon
    Jul 17 '16 at 11:00
  • $\begingroup$ To clarify what @lemon said... You need to give different materials to the cockpit and body, then assign those materials to the faces of your object where you want them to apply. After that, you assign your textures to the materials, select the faces you want to uv-unwrap, and adjust your uv map in the uv editor as needed. Both materials can use the same texture file and be mapped to different areas of it. $\endgroup$
    – Anthony Forwood
    Jul 17 '16 at 21:59
  • $\begingroup$ @lemon i've done your first advise in the first place, but while I was texture painting, the uv wrap of the other part bother me. As for your second advice, that's not what I want. I want the cockpit and the body have their own image texture, and it means different uv map. thanks for your help though $\endgroup$
    – robbysamuel
    Jul 18 '16 at 11:27
  • $\begingroup$ @AnthonyForwood what I want is two texture file for each part, thanks though $\endgroup$
    – robbysamuel
    Jul 18 '16 at 11:32
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Example : we have a plane and want to 3 materials based on two textures.

Plane parts :

  • The cockpit : glossy material with texture 1
  • The nose : diffuse material also with texture 1
  • The other parts : diffuse material with texture 2

enter image description here

  • Create your plane
  • Add the three materials
  • In edit mode, select the wanted faces and assign them to the corresponding material

enter image description here

  • Create your UV seams (probably corresponding to the material). You may also have done the seams before the material assignation

enter image description here

  • Select the wanted parts using the "select" button of the material,
  • Then UV unwrap

enter image description here

  • The materials can be defined as you wish (here I used a bake to produce the textures
  • You can also export the UV map parts separately in order to paint over it in the tool you want (or paint directly here in Blender)
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  • $\begingroup$ Allright I get it now, and I've figured out the problem on the other program. You've been very helpful thankyou lemon :) $\endgroup$
    – robbysamuel
    Jul 18 '16 at 15:58

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