Correct image aspect ratio in Redshift material

[kariomart]

I'm using an image for a Redshift material and don't know how to ensure it has its correct aspect ratio. I've tried all the Projection methods in the material's tag, but all seem to distort it and I have to eyeball the correct aspect ratio. Is there a way to make sure it's exactly what it should be?

[Dr. Sassi]

Hi kariomart,

This question would mean you work on a flat object, as a sphere would always distort the image.

The use of 2D textures on a 3D object is (as you surely know) via UV(W).
The UV space is measured in 0-1, meaning it is normalized, to allow swapping out low-res to high-res images, for example.

The UV polygons are the translator of how an image is used on an object.

However, things change in animation, and stretching is a typical way of making geometry changes possible.

I nearly hear you, that is not what I mean, I have a plane and want a picture on it. perhaps in 16:9 ratio. Same story, once the UV is set up, it should work just fine.
You can always set a reference with a plane that follows the pixel dimensions (given you have square pixels, or adjust for non-square pixel use, like in the old SD formats).
Side by side, this should help.

Is it a plane and a specific ratio? Or? Then I can share an example.

Cheers