funky sparkles

[EricCamper]

On the leather chairs and some of the wood I have these funky specs. I assume it is becuase the material has a little reflective thing going on. Any ideas gurus? And a big thanx to everyone on this project. I am making this my Magnum Pi Opus...or something like that..

[glorybound]

Sparkles

I think it is groovy... leave it! Do you have v-ray sun on? if so make it invisible.

[sv]

you need more subdivisions on the reflective material.
they are also visable on the wood of the clock - you could switch to Adaptive DMC sampler and up the amount of subdivisions & clr threshold here to control it better.

[EricCamper]

Ok...I shall give it a try...Bobby...The client actually said the same thing, but I just assumed that I had done something wrong. LOL... BTW...Thanx for the dome thing....I used it in an interactive presentation for the county. Worked great.

[glorybound]

Sparkles

Eric,

Did you get rid of your sparkles? I am having the same issue.

[Clifton Santiago]

Looks like you need to enable Sub-pixel mapping and Clamp output.

I assume you have reflective GI caustics disabled? Even so, that only disables the GI caustics from the primary bounce (as far as I undertand it anyway), but secondary bounces can still cause this problem.

I get this problem when I have really bright light striking one surface, and being reflected into another w/glossy reflections. Do you still get it without glossy reflection?

[glorybound]

I ended up changing my material, but I'll try your post next time. That Sub-pixel mapping and Clamp output seems confusing. I read a lot not to check them and in other check them... even the warning vray gives you is your colors might now show correctly.

[Neilg]

even the warning vray gives you is your colors might now show correctly.

Thats only an issue when rendering to floating point and matching colours exactly - Its not nearly as major as that makes it sound.

Both on but clamping at 5 is what I tend to use. Ramp up the subdivision on the glossy reflection and give DMC AA a shot if it's still around.

[CarlosBZ]

I don't know if this is a similar situation...










Beeing an animation I choose speed, render time over all other options. I think adaptive QMC is fast but when it comes to eliminate those bright points with material subdivisons it gets quite slow, aQMC is good with thin lines, very very good but it's terrible with glossy (light reflections ?), and, in the other hand, aSubdivision is a very smooth solution for the materials and glossy but is terrible with the thin lines and not so slow overall in the material subs arena. One can fix aSubs thin lines problems increasing min/max rates but you may got stuck/trapped in a very long render times.

For still images maybe render times is not a big deal.

final settings and the final animation:




http://www.dreamimg.com/Vray-Forum/a...ining-v03b.mpg (14 Mb)

[glorybound]

Interior animation

Nice animation! I don't see any flickering so was the material your issue?

[CarlosBZ]

Nice animation! I don't see any flickering so was the material your issue?

Yes! too many "funky sparkles"

but also the thin lines were flickering a lot.

[RErender]

you might try "sub pixel mapping" and "clamp output" in the color mapping

[CarlosBZ]

you might try "sub pixel mapping" and "clamp output" in the color mapping

Hi RErender,

What exactly does "clamp output"?

[gilpo]

Carlos,
So how many subdivisions did you end up using on your wood cabinets for the final animation?

[RErender]

Hi RErender,

What exactly does "clamp output"?

As I understand it "clamp output" will clamp the value of very bright pixels (greater than 1.0 float) to 1.0 float (or to the value set in the adjacent box) These pixels are then easier to AA.