AccuRender nXt

advanced rendering for AutoCAD

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

 

Views: 296

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

Roy Hirshkowitz replied to geoff herguth's discussion object selection
"I'm pretty sure the ability to render a selection set doesn't exist anymore. Tools like layer or visibility manipulation will work."
yesterday
geoff herguth replied to geoff herguth's discussion object selection
"I'm not talking about a walk thru. If I have a number of objects in the AutoCAD model but, only want to select one object to render, AR3 gave you the option to select a portion of the model with a window. That option no longer…"
yesterday
Kevin Lockwood replied to geoff herguth's discussion object selection
"Render Region in the walkabout window. It dosen't work the same as it did back in the AR3 days. Used to be, if you needed to  fix something after a render, you could and just redo a portion and overlay it in photoshop. With the way…"
Wednesday
geoff herguth posted a discussion

object selection

Way back in the old days I remember having the option to select the objects to be rendered with a window. Does that feature still exist and where do I find it?See More
Tuesday
Glenn Massey replied to Glenn Massey's discussion size of image
"I am still having issues with the size of the image created. still comes out grainy when I try to do anything with the image"
Tuesday
George Ioannidis replied to George Ioannidis's discussion Interior - rest corner
"Thanks Birdman :)"
Sunday
Sampdoria replied to George Ioannidis's discussion Old project - new render - long render time
"Hi George, all well buddy. Sure, I will dig up some renders done in the last couple of years. Take care! :)"
Sunday
George Ioannidis replied to George Ioannidis's discussion Old project - new render - long render time
"Hi Birdman, it's been a while not seeing you here! Any new (stunning as always) work to show? Make our jaws to drop again! ;)"
Sunday

© 2016   Header image courtesy Peter Milner   Powered by

Badges  |  Report an Issue  |  Terms of Service