580 GTX 3 GB does exist and will allow you to create bigger scenes. Some early models had driver problems but with Mortens page to fix these issues it is a safe bet.Since all content in Lumion is loaded onto your 3d card massive scenes might get really slow with 1.5 gb.
if i purchase lumion ultimate before 1st june and if i want to upgrade it to lumion pro, the next day after the activation/registration of my lumion ultimate..... am i allowed to do so???in what time will i receive the product key and the lumion setup?what are the commercial terms, i.e. the mode of payment, what amount shall i pay as advance?