Hi, I've tried to use your advice, all good, but i've got problem:
I created three custom fields: year, model and producer.
Next I created three filters.
Next I added some values of custom fields for product properties.
In situation, when one product use for several models and yers of produce, I have a incorrect displaying, for example
I have Product1 and it use for Model1 for 2001-2006. Also it use for Model2 for 2005-2008. So I fill in product properties:
custom fields
year: 2001-2008
model: Model1, Model2
Producer: Producer1.
When I choose (at frontend) for filtering Model1 and Hikashop lets me select incorrect variant 2007-2008. I know, that problem because incorrect settings, but can't understand how to solve it.