Bercon maps and vray displacement mod

[jstrob]

Hi,

I am rendering a mountain with displacement by vraydisplacementMod with a composite map with many layers of bercon noise.

when I render on my render farm, each computer has a different result for one of the bercon noise.

I am using bercon map 3.04 for max 2015 compiled by vlado with vray 3.15.01.

any idea?

[jstrob]

I isolated the changing bercon noise. so now I have only a vray color and the berson noise in my composite map. And the noise is different on each slave. On any single slave the noise is identical but every slave has its own version of the noise...

you can see wht's going on here:
http://www.phylacterecola.com/strob/...gNoise_out.mp4

my noise is creating small cavities across the surface. but only some of these are disapearing.

[vlado]

Can you get me a scene for this? I have to go through the Bercon code to see if there are parts that are non-deterministic.

Best regards,
Vlado

[jstrob]

yes I will create a simple scene right now

[jstrob]

Here is the scene:
http://www.phylacterecola.com/strob/...ercon_v001.max

I could get rid of this bug by switching my bercon noises to 3D instead of 4D. In this scene I have a bercon noise simplex 4d and a second bercon (perlin 4D) that distorts the first one. i switched both to 3D and adjusted low and high to get similar result. and now I don't get dancing noises anymore.

[vlado]

Ok, good to know that there is a work-around. Thanks for the scene - will try to see what's going on when I have a bit of time.

Best regards,
Vlado

[jstrob]

But please note that the workaround works only if we don't need to animated or change the phase of the noise. Cause the phase is only accessible with the 4D versions of the noises.

[Svetlozar Draganov]

The bug must be in BerconMaps plugin itself since the same issue appears with Scanline renderer as well.

[vlado]

The bug must be in BerconMaps plugin itself since the same issue appears with Scanline renderer as well.

Well yes, but it would still be good to look at the sources and try to track it down.

Best regards,
Vlado

[jstrob]

I now have a scene where I avoided 4d noises in the bercon maps and I got the same problem of dancing noise... So from now on I will avoid using bercon maps for animation. They're too unpredictable. Or maybe I could bake them when possible. One thing i like with procedurals is we don't need uv so it may become useless using them if I have to bake them and create uvs.

[jstrob]

Any news about the bercon noise dancing? I still get this problem all the times.

[ior=0]

Sounds like the same problem we are having here:
http://forums.chaosgroup.com/showthr...Envfog-buckets

Bercon noise is definitely broken, especially on DR nodes.

[jstrob]

Yes it's like if bercon noise is using a different seed for every computer. I know it's not created by chaosgroup, it's free and nobody officially supports it but it's so incredible, useful ansd better than regular max noise when it works that it quickly became a plugin I use in every of my projects.

I wonder if there is any other commercial plugin with official support that does the same things?

[theedge]

There's a request in this direction : http://3dsmaxfeedback.autodesk.com/f...dural-textures and it is flagged as under review.
Maybe increasing the votes can make things go faster ?

[jstrob]

Ok thanks I just added my 3 votes. But I hope they can create one with all the bercon features like the ability to distort a noise with another one to make it feel more natural.

Maybe it could be a feature of vray instead...