AccuRender nXt

advanced rendering for AutoCAD

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

 

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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.

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Rich Hart posted a discussion

New install posted with Support folder included.

It turned out that the Support folder had been left out in the latest 64 bit nXtRender install, so the nXt material Editor was not showing the sample rendered image correctly.We posted a new install with th Support folder included again. The new install file name ends with QF23c.Here is the direct link to it: http://www.renderplus.com/downloads/nXtRender/arnxt64_0358-QF23c.exeor you can download…See More
Tuesday
gustavo talpo posted photos
Oct 14
Roy Hirshkowitz replied to Roy Hirshkowitz's discussion AccuRender Studio
"Thanks-- try this one.   I'll fix the entry above as well."
Oct 9
franz plötzl replied to Roy Hirshkowitz's discussion AccuRender Studio
"the download link seem not work."
Oct 9
Roy Hirshkowitz replied to Roy Hirshkowitz's discussion Cloud rendering
"You're definitely not doing anything wrong.  Make a note of any problems and we'll deal with each of them individually .  There is a new material model and new rendering engine so there may be some differences that will be…"
Oct 6
Brandon Eckhart replied to Roy Hirshkowitz's discussion Cloud rendering
"Great, thank you! I've got the export working now. I was hoping it would export more of what I'd already set up in nXt. It converted most of my materials to Studio equivalents, which aren't as sophisticated (metals are more…"
Oct 6
Roy Hirshkowitz replied to Roy Hirshkowitz's discussion Cloud rendering
"Type "netload"-- navigate to Program Files / AccuRender Studio -- and grab the appropriate plugin version-- ArStudioAcadPlugin## for your version of AutoCAD. Type "arscene" to create the scene file and load AccuRender Studio.…"
Oct 6
Brandon Eckhart replied to Roy Hirshkowitz's discussion Cloud rendering
"I'm definitely interested in getting this working on my end. We've invested a lot of time into this software and I really don't want to transition to something like REVIT/3ds just for cloud rendering as I consider your software…"
Oct 6

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