Triple image approach for every photo

[Maxim Pishnyak]

Borro, you could perfectly simulate Phoca Gallery behavior in Virtumart.

You just need to decide for youself which page which image must have.

Hello, Maxim

So you suggest to simulate creation of three jpegs after each image donwloading and then correct links in detail view, don't you?

Hello, Borro.

Nope.

Here is the shop but it's under attack now, not available

It's very clear for everybody that you are not able to show us your prototype with easiness.
But in your case it's important to overcome some your problems and to place for example standard demo Virtuemart shop on, I don't know, on free web hosting elsewhere.
Thus you'll be able to control and show publicly what big/medium/small picture you able to put in shop and with which specific images you have problems.