AccuRender nXt

advanced rendering for AutoCAD

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

 

Views: 266

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.

RSS

Search

Translate

Latest Activity

mike makki replied to roberto sacchetti's discussion memory problem
" hi george i did a render 3 years a ago for harvester restaurant where i needed to show rpc people eating ,walking in ,standing etc....i could only put about 13 of them.....then i tried 15...i got the message roberto got....i took it down to 13…"
7 hours ago
George Ioannidis replied to roberto sacchetti's discussion memory problem
"According to Micro$oft the memory limit of Windows 7 pro 64 bit is 192GB on physical memory. I doubt anyone could ever produce model that big. I remember one of my "heaviest" model I ever did with particle grass translated into mesh…"
8 hours ago
mike makki replied to roberto sacchetti's discussion memory problem
"i dont hink so roy....the more objects the more memory...."
8 hours ago
roberto sacchetti replied to roberto sacchetti's discussion memory problem
"I have a 1tb hdd, so I can increase the swap file size. How do I know which object is damaged rpc ???? are many: plants, people, cars ..... or I have to go to attempts?"
17 hours ago
Roy Hirshkowitz replied to roberto sacchetti's discussion memory problem
"This is most likely not a memory problem-- it is a crash-- perhaps in the RPC code.  As long as you have swap file space available-- usually any free disk space-- you shouldn't run out of memory when using the 64 bit version.  It is…"
19 hours ago
roberto sacchetti replied to roberto sacchetti's discussion memory problem
"I try tonight"
23 hours ago
mike makki replied to roberto sacchetti's discussion memory problem
"don't use so many.....shed half of the cars....and you wont have memory problem  "
yesterday
roberto sacchetti posted a discussion

memory problem

I just finished a 3D model; it is a shopping center with parking.cars and all objects are rpc. if you freeze the layer where there are the rpc render me it does.if I thaw the layer memory problems. any of you had this problem? how to solve it?the configuration is the following:windows 7 pro 64 bitautocad 2010nxt 318B 64memory pc 8g3d model with rpc layer thawed …See More
yesterday

© 2014   Header image courtesy Peter Milner   Powered by

Badges  |  Report an Issue  |  Terms of Service