Strange artifacts with MipSmooth

[Thar]

I found MipSmooth(preset="animehq") causing these:
http://img117.imageshack.us/img117/4427/shctswo8.th.png (http://img117.imageshack.us/my.php?image=shctswo8.png)http://img117.imageshack.us/images/thpix.gif (http://g.imageshack.us/thpix.php)
(before | after)

Did anyone also experienced it?

[martino]

What are you actually pointing at?

/me can't see anything wrong

[45tripp]

look at the top two fire light things,
beside to the right they have like a shadowed burn in effect

[Didée]

Nothing spectacular, just the usual "temporal filtering with fixed thresholds" desease. Generally, all not-motioncompensated temporal filters are more or less prone to produce such artifacts. Using "allow filtering when pixel-diff is lower than X" is not a safe concept. It mostly works out, but not in all cases. You just found an example why the simple threshold-concept is not safe.