What does this log line mean?

[Art48]

Estimated progressive buffer memory usage of 7049 MB is over the limit of 2048 MB. Falling back to per-pixel filtering.

What exactly does it mean? Can I increase that limit? What effect does it have? Slower rendering? Different rendering?

[radoslav.platikanov]

Vlado explained it here:
http://forums.chaosgroup.com/showthr...ain-resolution

[Art48]

Good read - but I am confused. He said the end result will be the same? Doesn't look like it in the example images the thread starter posted?
"The way is different" - meaning slower propably?

[vlado]

He said the end result will be the same? Doesn't look like it in the example images the thread starter posted?

The result is the same given enough render time.

Best regards,
Vlado