Woocommerce Thumbnails soft crop not working

Hello,

i am just setting up a new website and i have a big problem.

I have many images with many different sizes (landscape, horizontal, etc.) and what i want is to fit all these pictures in the thumbnail, so that the whole picture can be seen and the rest is filled with white background, i read that this is called “soft Crop”. I searched for many hours and cannot do it. Tried various plugins etc.

can you please help me and tell me what i have to do so that this works?
i am using woocommerce 3.7 and the Atelier theme.

best Daniel

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