I have created the following image, by heading to 'Windows > 3D > Extrusion > Create' within Photoshop:

enter image description here

I would now like to reduce its Extrusion Depth, using Millimeters as the unit of measurement. At present, the Extrusion Depth is set at 224 as per the below screenshot:

enter image description here

I can only assume this is a Pixel Measurement. Is this the case and if so, is there a way to change its Unit of Measurement?

  • I just realized you can actually change the units, I edited my answer to reflect that.
    – Luciano
    Nov 6, 2019 at 14:08

1 Answer 1


When you create the 3D extrusion you can see in the Properties panel that the unit for Extrusion Depth is indeed px:

Properties panel

Also in the little preview window that pops on top of the canvas:

3D preview

But you'll get an error if you try to type a different unit in the Properties panel. You need to click on the Coordinates button and there you can change the units:


  • Thanks for your response. I have just modified my question to include an additional screenshot. As you can see, the px unit is not included. In fact, it does not allow me to enter any unit of measurement. I have also gone to the 'Coordinates' area, where the 'Units' field is not present. Do I need to alter some settings elsewhere, in order to generate the 'Units' option?
    – Craig
    Nov 6, 2019 at 14:22
  • I have just used a new version of Photoshop, where I can see the 'Units' field. I guess Photoshop simply did not offer this feature, within an older version I was using.
    – Craig
    Nov 12, 2019 at 1:43

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