AccuRender nXt

advanced rendering for AutoCAD

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

 

Views: 281

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

S. Jaisimha replied to S. Jaisimha's discussion Bump map for material
"Thanks for replying George. I tried a displacement map, but I am having serious trouble getting the map to sit right. Is there any example for nXtRender anywhere that I can follow? Will one single material with a displacement map work immaterial of…"
1 hour ago
George Ioannidis replied to S. Jaisimha's discussion Bump map for material
"I think that for that type is better to use displacement map. Displacement actually modifies the geometry rather then just fake the relief."
1 hour ago
S. Jaisimha posted a discussion

Bump map for material

I want to create multiple materials with different bump maps, so that they can be assigned to the objects in AutoCAD for rendering. Please see the attachment for an idea. The idea is to assign the appropriate one to the object for rendering.If this can be achieved, it will avoid a whole lot of symbol creation, since right now to get the design etching, we are creating individual symbols for each design. Obviously this is very time consuming and results in literally thousands of DWG files, one…See More
4 hours ago
Wallace Amorim Júnior replied to Wallace Amorim Júnior's discussion Download NXT
"That works. Thanks, Albert Hart."
yesterday
Albert D Hart replied to Wallace Amorim Júnior's discussion Download NXT
"Try this direct link for the current 64 bit   nXtRender - May 2015 OE08: arnxt64_0354-OE08.exe"
yesterday
Wallace Amorim Júnior posted a discussion

Download NXT

Hi, guys.I had problems with my computer and I had to buy a new one. I lost many files and had no backup of nxt installer. I came to try download again, but the page is empty.What can I do to be able to download it?Thanks.See More
yesterday
Peter Milner commented on Peter Milner's photo
Thumbnail

fulcrum brochure 2014 08

"If you mean Field of View, I have it set to 50."
Monday
kingjin commented on Peter Milner's photo
Thumbnail

fulcrum brochure 2014 08

"Well, thank you, may I ask how to set the focal length of the camera?"
Sunday

© 2015   Header image courtesy Peter Milner   Powered by

Badges  |  Report an Issue  |  Terms of Service