Hi there,
Could you tell me that your extension and this function. I have products in VM3 - one in parent and others are child products made using multivartiant custom fields. I simulate this case in my friend shop - he use megafilters extension. Parent product have 80cm height and child products have 80, 90, 100, 120 etc. In filters I see only 80cm. Second values for products is color. Child product height not load to filters.