This is a follow up to my previous question (related, not a duplicate): Units in UV Editor (Imperial to Metric)

I would like to use:

  • Inches
  • cm
  • mm
  • m

During the creation or export phase: enter image description here

So I won't have to do conversions from a unit to pixels.

if there is no option yet, I'll do the below then. - Thanks

I'll look the dev repo on github and will make a pull request.

  • To support: cm, mm, m, km, inches, feet/foot, yards.
  • 1
    $\begingroup$ Unwrap space is not directly related to scene coordinates. UVs introduce distortions, so you can't unequivocally map scene units to UVs $\endgroup$ – Duarte Farrajota Ramos Feb 26 '19 at 15:15
  • $\begingroup$ @DuarteFarrajotaRamos you are mistaken, its not scene coordinates, its the input field only. so this will get the the screen dpi (dots per inch) 1 inch = 2.54 cm dpi = 96 px / inch 96 px / 2.54 cm Therefore one centimeter is equal to 1 cm = 96 px / 2.54 1 cm = 38 px for 96 dpi. so this if the inputs are: 1cm, it will get the screens current dpi then divide by 2.54 and multiple that result by the the input of 1cm or whatever cm. pixels = RoundUp(input * (dpi / 2.54)) $\endgroup$ – Dean Van Greunen Feb 26 '19 at 20:20

This doesn't exist yet.

I will be submitting a pull request to the Blender3D Repo for version 2.80+

It will allow you to enter:

  • MM, CM, M, KM, Inches, Foot/Feet and Yards

with a screen DPI of 96 DPI it will take input: 20cm

and it will output: 756px

Using this formula:

  • dpi = current monitor/screen or blenders dpi setting
  • scale = getScaleFromInputField() * 2.54
  • pixels = RoundUp(input * (dpi / scale))

getScaleFromInputField will convert MM, M, KM, Inches, Foot/Feet and Yards To Centimeters and return the correct value

Using this conversion chart: enter image description here

You can contribute to my repo: https://github.com/DeanVanGreunen


Hmm you can select scene unit at "Scene" panel (Blender 2.79b) but for the new texture setting it's unavailable yet.

enter image description here

BTW I don't think the unit "cm/m" makes any sense for texturing because the images are used on the basis of modeling, instead of printing... Meanwhile there're other factors that can influence width/height, dpi/ppi for example. Nah, that was my subjective idea.

  • $\begingroup$ well lets say you want to set the size of a image to be 1m by 1m with the correct uv gird when exporting it. this would allow you to edit quickly and also enter real world sizes without conversion charts $\endgroup$ – Dean Van Greunen Mar 1 '19 at 9:56
  • $\begingroup$ also dpi can be changed when you edit the texture in an editor like photoshop $\endgroup$ – Dean Van Greunen Mar 1 '19 at 9:57
  • $\begingroup$ this just makes it that most of the work is done, also no guess work involved $\endgroup$ – Dean Van Greunen Mar 1 '19 at 9:57
  • $\begingroup$ also in 2.80 (as per question) this metric for the UV is missing (unless it hidden away, i've checked all panels and tabs, and also the prefs) $\endgroup$ – Dean Van Greunen Mar 1 '19 at 10:00

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