Yes, Alamy has been asking for this for some time now....Is it "heavy"?.....I think the answer to that lies more in the the fact that the "quality" of upsizing software has gotten much better....

So much better in fact that  it is now a REQUIREMENT of a respected stock agency.

BTW...a 6MP cam image gives you about a 17MP TIFF...that's where Alamy's numbers come from. Girsempas PS instructions are correct....in addition to Genuine Fractals, you can also d/l the Alienskin blow-up demo and give it a try....it is supposed to be quite good as well.

@Girsempa...Of real concern is this......We have just gone through the Xwall incident and you were the first to notify this forum of those rips.  Do you realize that all of those rips could turn into quality size print material with the upsizing software discussed above?  I have been investigating these upsizing programs for some time now...and their quality is very good....depending on the type of image...upsizes of six to eight times are feasible.

So, let me ask you this.....do you still want to keep posting your 800X600 images here without heavy watermarking?

In youth, we learn....with age, we understand.