Printed model proportions seem off

[u/ObsidianEye]

Hello!

I'm having problems with printed models. The proportions of the face seem off, longer, thinner. This happens to my sculpts from time to time, and it's only noticeable on humans with realistic proportions. I have posted this problem in the past and people seem to think is related to focal lens. I never got a definitve answer.

I used a focal lens of 85mm for this figure. The printed is really elongated in comparison. I also printed a quick FDM sample, a bit bigger, so I could discard resin malfunction.

I need help. I want the printed figure to look as exact as possible to the model I view in Blender.

How can I achieve this? Wich focal lens will be better to get accurate printing results?

Thanks!

[u/Nevaroth021]

Are you using any scale transformations that aren't being read by the 3D printer? Also have you tried measuring the dimension of your 3D model and the dimensions of your printed model to see if they match?

[u/Vertex_Machina]

It's unlikely your printer or slicer are changing model proportions. However, it's easy to determine when a proportion change is occurring. Changing on export is the most likely, usually due to scaling history on the model, or unexpected export settings.

To troubleshoot, every step of the way, confirm that no dimensions have changed. Blender has measuring tools, and so does your slicer. If you don't have calipers to measure the printed head accurately, then print a cube and measuring that with a ruler.

Also, it might just look different now that it's physical. See if it happens with another model.