Can't get rid of fireflies

[gerbilho]

Trying to make a simple interior but I can't get rid of these annoying fireflies...
I know there are some topics on the subject, I've read a few but nothing seems to help...
I mean, I think these are fireflies, or is it normal to have such strong noise and it will go away with more passes. This current image has 45 passes.
I tried with override material and I continue getting fireflies. Does this mean it could be a geometry problem? What kid of geometry problem could cause this?
I'm using corona lights.
Corona with all default settings.

Ideas anyone?

[maru]

Are you using IES lights?
Are you using lights placed inside reflective frames or shades?
Do you have any reflective materials (glass or metal) with reflectivity set to 1.0?

[gerbilho]

Are you using IES lights?
Are you using lights placed inside reflective frames or shades?
Do you have any reflective materials (glass or metal) with reflectivity set to 1.0?

No IES lights.
I have two lights inside reflective objects (for instance the lamp model which is like an inverted bowl, has a corona spherical light in it.
Yes I have glass and metal with reflectivity to 1.

But if any of those were the problem it would have been solved by the material override, no?

[gerbilho]

I made another test with HD cache record quality set to 2048 and the fireflies are gone.
My question now: is it normal to have fireflies with the default 512 setting in simple interior scenes with lights and reflective materials? Or is it still an indication of something problematic in the scene?
Also should I avoid reflectivity of 1.0 ?

[filipskrzat]

i dont exactly know how corona works, but in vray it would be "not enough samples" so render time would go high (only 3 small lights for complicated scene)

samples shot from light would bounce, bounce, bounce, then dissapear (you set number of bounces tho.) leaving you with noise.