FIlter override

-- HikaShop version -- : 3.4.0
-- Joomla version -- : 3.8.6
-- PHP version -- : 7.0.29
-- Browser(s) name and version -- : FireFox 59.0.2

Hello, I need to override the product filter output. I need the functionality of the checkbox, but the output needs to be as the cateogry images on which I am filtering. Is there a way to override the filter output?

I found the view file /product/filter.php but this takes fully formatted output form somewhere else. IN other words, I can not override the output in the view file.

What file(s) do I need to modify (and where in those file(s)) in order to output the category images as filter checkboxes?

Thanks in advance,

Erik

Thank you Nicalos for that answer. Modifying the the generated HTML is an option, but maybe not entirely. I need to add the category images to the HTML and htat would require fetching those form the database table(s). It makes more sense to do that before the HMTL is generated and fetching input form the database is not something that should normally be done in the view file.
But your point is practical and that's OK too.

Thanks for the input and I'll look into what will be the most practical solution.

Erik