All my thumbnails on homepage are blurry. But not in the product detail.
Has nothing to do with the template. How can I fix this?
https://maurice-en-co.be/shop
Your thumbnail images are generated at 200px wide, but your template displays them at 260px, hence a loss of definition. Try setting the thumbnail image width to 260px on the VM Configuration/Templates tab under Media Files Settings.
Thanks for the hint - I will try that.
If I change the size, will all thumbnnails be re-generated automatically?
Yes, as long as Enable Dynamic Thumbnail Resizing is on.
If you set the path for the thumbnail, it stops being blury. I just set the same path for both and it works, but never forget to add it twice.