AA settings for reflective and glossy surfaces

[mzmeskal]

Hi there,
it seems to me that vray ia having a hard time with the AA quality.

I have glossy stainless steel mat applied to a construction...the further parts render fine, but the closer have some kind of weird blotches on the edges and also are not sharp at all.

the glossy mat setings have interpolated glossy reflections (-3,0), 50 interpolation samples...high enough I assume...

I have catmull rom applied, AA adaptive -3,0

irrad map setting -3, -1

What do you think is it a problem of the material or is it the problem of AA or irrad map???

I am kind of frustrated with this cos I think that vray must do better...any suggestions?

[cocolas]

your AA seems really low - I usually use -1/2 sometimes 0/2 or in extreme cases 1/2 or 1/3.....mostly the first two though - for final output.


paul.

[mzmeskal]

sorry I checked tha and its actually 0,3.....no -3,0

so the problem is back to be solved...please help....it getting on my nerves.

[vance3d]

I don't think your problem is one of AA settings. What you seem to be having are errors in the interpolated glossy reflections. I would suggest not using them for your foreground objects. I have found interpolated glossy reflections to be nearly useless especially in animation where the results are inconsistent and unpredictalbe.

Vance Miller

[mzmeskal]

this is the issue I am talking about


To Vance3d: Ill try the direct calculation and post the result

[egz]

The artifacts in your picture are from the interpolated glossies. For that kind of surface I would use non-interpolated instead, with maybe as low as 6 subdivs.

Interpolated glossy reflections are better for large surfaces without much geometry detail, such as floors and walls.

[flipside]

Interpolated glossy reflections are better for large surfaces without much geometry detail, such as floors and walls.

And even then, it's not always good. If you have some detailed objects on your floor, they will look very weird in the reflections. I think it's only good if your reflections need to be very very blurry.

I like them more for blurry refractions, I've had more succes with them there.

[mzmeskal]

Yep, you are right, rendered the image last night with direct copmputation and its gone, even AA is much better.....well I would post the result but I fell asleep while waiting for the render to finish...that one took too damn long....BTW ....6 subdivs is a little less.....I use 10 and it still has some grain....Ill try it with 15 or 20..

Thanks for replies guys.....It could have kick me earlier..

[flipside]

Try a combination of lower subdivs and higher AA. This can be faster than using 20 for subdivs.