AccuRender nXt

advanced rendering for AutoCAD

Coming soon-- path tracer only.  Architectural applications are probably limited-- but it's interesting new territory anyway.


Views: 320

Reply to This

Replies to This Discussion

Here's a blend of SSS and procedural marble:


Will do well in certain ceramic tiles


There is very well function of nxt, thank you! :-)

Here's a different use of a similar technology:

Is that fog I see?
In this case, confined to a box 1 meter high.  Uses subsurface scattering techniques...
What's the point of this technology?
I'm not sure I understand the question.  Do you mean "what are the applications?"
I just want to know what exactly your message means - Subsurface scattering - is it some new funcionality in nXt? What's so special on these pictures? What gives this technology?

There's an ok summary of subsurface scattering on Wikipedia.  It's an industry standard term so there's quite a bit about it out there.  Here's another decent article.


Generally speaking, the lighting in nXt and all previous versions of AR occurs at the surface only.  Subsurface scattering is essentially a volumetric technique, where interactions also occur within the medium.  It's required to accurately model materials which we think of as "translucent".  It's also helpful with materials where the light penetrates the surface a little bit-- such as the marble dragons-- and then scatters on its way out.  The feel of the images above would be very difficult to achieve without this technology.


A similar technique can also be used to model other participating media, such as the ground fog above.  This has a very different feel than previous fog implementations.  The technique can be extended to model non-homogenous participating media-- things like smoke or non-uniform fog (clouds?) etc..


Downside is that it can take a long time to resolve these materials-- accurate simulations almost require a path tracer approach.

Thanks a lot for this explanation. Looks promissing.

BTW. I found the Path Tracer the most interesting and valuable feature of nXt. It gives realy soft light (for the first time in whole AR history). But it's not perfect - it's slow - sometimes even hours and houndreds passes don't fix the noisy areas. I'd like to ask you - are you planning to develope this engine? I think it realy worth it.

It is being developed-- subsurface scattering is an example of this.  I'm working on a stand-alone version of the engine as well.

If you mean-- will the performance improve substantially?-- I don't think so.  I don't have any magic wands to wave at the moment.  One of the things I'm going for with this engine is simplicity.  None of the really technical items matter to the path tracer-- for example: Glossy switches, daylight portals, ambient lighting settings, etc.. have no effect.  The combination of this simplicity and the calculation of more light paths slow the thing down-- quite substantially in the case of interior daylighting.  The above mentioned stand-alone has almost nothing to set.

I'm also investigating another engine that has the potential for even more accurate simulations-- probably a little slower, though.

On the bright side-- computers continue to get faster.




Latest Activity

Peter Milner posted a discussion

Product Key

Could you tell me where I can find the product key for my renderfarm?I need to add a new computer onto the system.See More
1 hour ago
Cesar Montero posted a discussion


Hello,I've been using the trial version at work but it crashes when I have more than 2 drawings opened in Auto cad while running a rendering. Is anybody having the same issue? I'd like to know if it is a nxt issue before buying the original.Thanks,CesarSee More
Judith Klein replied to Judith Klein's discussion NXT Settings - Was ist das? - what´s that?
"Hi Roy, is it possibel to send me the file in Version 2007? Best regards, Judith."
Roy Hirshkowitz replied to Judith Klein's discussion NXT Settings - Was ist das? - what´s that?
"I've looked pretty closely and haven't been able to find anything wrong with the drawings or the algorithms.  It's definitely having trouble with the lighting in this model-- I did the following: Changed the beam angle on the…"
Alfons Akamp replied to Judith Klein's discussion NXT Settings - Was ist das? - what´s that?
"Da bin ich mal gespannt. wa da heraus kommt."
Sep 17
Roy Hirshkowitz replied to Judith Klein's discussion NXT Settings - Was ist das? - what´s that?
"It's not a units issue, they're ok. I'll let you know soon what I've found."
Sep 16
Judith Klein replied to Judith Klein's discussion NXT Settings - Was ist das? - what´s that?
"Hi Thorsten, Ich habe DDUNITS eingegeben und da sieht man, dass die Einstellung in mm ist. Wenn ich dann ein Licht einfüge, kann ich nicht sehen, was das für eine Einheit ist. Deswegen versteh ich nicht, was ich da und wo ich da was…"
Sep 16
Thorsten Hedrich replied to Judith Klein's discussion NXT Settings - Was ist das? - what´s that?
"Hi Judith, soviel ich verstehe, meint Roy einfach nachzuprüfen, ob die Einheiten, mit denen die Lichtquellen eingefügt werden (mm,cm,m,inches...) auch den verwendeten Einheiten in Deiner AutoCad Zeichnung entsprechen. Dazu einfach in der…"
Sep 16

© 2016   Header image courtesy Peter Milner   Powered by

Badges  |  Report an Issue  |  Terms of Service