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I really would like to learn about UV mapping and I presume this is the best community for me to ask about Blender. I have a 3D building model produced from CityEngine and when it was exported into collada (.dae file) -or even .obj file- all its textures are stored in one folder. I mean, there are alot of images stored. I was searching for a means to merge these images into one image file and I have this UV mapping researched. I would like to ask how would I do that in blender. Can somebody help me edit my model and have the UV mapping in blender? I don't know where to start, I have importd my model into blender yet none of the textures were displayed. it's all white. I really appreciate help from you nad God bless.

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  • $\begingroup$ Are you using Blender Render or Cycles Render? $\endgroup$ – Igor Tatarnikov Aug 6 '15 at 7:13
  • $\begingroup$ I'm sorry Sir i don't know about that. .I am new to Blender. . I was not able to explore further about Blender. the only thing I have gone so far is to load my 3D building into Blender, that's all. . $\endgroup$ – king635 Aug 6 '15 at 7:31
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    $\begingroup$ Related: blender.stackexchange.com/a/7921/599 $\endgroup$ – gandalf3 Aug 6 '15 at 8:36
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    $\begingroup$ @King635, in my view, your project UV mapping an imported model from CityEngine, in Blender is like deciding to learn woodworking, and using this table as your first project. As I would advise you to choose another, less demanding project while learning to use the tools of woodworking, I suggest gaining facility with the tools in the Blender "toolbox" before tackling the UV mapping of the import. A good place to start this is the online courses under learning in question 15355 $\endgroup$ – brasshat Aug 6 '15 at 8:41
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    $\begingroup$ It might be useful to those who might wish to help you more completely, to upload a copy of your blend file to Blend-exchange, and post a link in your question so that those inclined to try to help could access the blend file causing your confusion. Exactly what the best way to combine the images into a smaller number will depend exactly on details of the images themselves. $\endgroup$ – brasshat Aug 6 '15 at 8:44
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To UV Unwrap your model, Go to Edit mode of your object and select all the mesh, then press U on your keyboard to open UV Mapping options and select smart UV project,

enter image description here

after change your window mode to UV mapping,

enter image description here

and finally open the texture you want to give to your object in the bottom bar,

enter image description here

once you opened you can scale and move your UV map untill it matches your texture how you want it.To scale press S key, to move press G key

enter image description here

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    $\begingroup$ I have already textures on my model. do these textures automatically mapped on its corresponding UV or there is a need for me to apply textures again . . Honestly, when I load my 3Dmodel into blender, these textures doesn't appear. $\endgroup$ – king635 Aug 6 '15 at 7:38
  • $\begingroup$ you have to open your own textures, I just gave an example of a texture, also opening texture in UV will not really give your object a texture, you have to go to materials tab in properties panel to apply a texture $\endgroup$ – Igor Tatarnikov Aug 6 '15 at 7:55

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