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I spent A few hours working on a UV map, then I needed to change the resolution of the texture to be a power of 2. I would like to be able to change this in blender without changing the UV map. How would I do this?

The first image size is 60x123, and the second is 128x128.

Before: Image of blender before texture changed

After: Image of blender after texture changed

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  • $\begingroup$ Do you mean you want to scale the UV map to fit the bottom image? $\endgroup$
    – Denis
    Jul 17, 2015 at 20:30
  • $\begingroup$ Yes, that is what I want. $\endgroup$
    – gudenau
    Jul 17, 2015 at 20:32

2 Answers 2

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First select the UVs in the UV/Image editor, make sure the X and Y cursor location is 0, switch Pivot point to 2D Cursor and scale the UVs using S button, hit X to limit the scale on X axis, input 0.5 and hit Enter

enter image description here

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  • $\begingroup$ I attempted to do that with "correct" values, but the UV map was not aligned properly. $\endgroup$
    – gudenau
    Jul 17, 2015 at 21:22
  • $\begingroup$ Then you will have to scale and move on the X axis manually till it fits the new texture $\endgroup$
    – Denis
    Jul 17, 2015 at 21:25
  • $\begingroup$ Turns out Pixel Snap broke the scaling. $\endgroup$
    – gudenau
    Jul 17, 2015 at 21:44
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Initial situation

enter image description here

Old Texture is 608x368 New is 1024x1024

Put 2D cursor to your pivot vertice ad set "Scaling pivot" to "pivot"

enter image description here

scale on X by pressing S and than X. The value from reparametrize the UVMap on this axis comes from the operation Old_X_resolution/New_X_resolution

enter image description here

In my case 608/1024=0.59

Repeat for Y axis

enter image description here


Suggestion:

in this way you are not increasing the amount of details of your texture in the texturing of the word, as the word DOOM contains the same amout of pixel as before, but in a bigger texture.

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