AccuRender nXt

advanced rendering for AutoCAD

This one introduces two new engines.  Both of these are very experimental at the moment. I may not retain either of them if they don't prove useful.  Although they appear very stable, there may be some hidden bugs.  Be careful using these for production until we have some confidence in their stability and characteristics.  The engines are only accessible via the nXtEngine AutoLisp command use (nXtEngine 2) -OR- (nXtEngine 3).


Both engines include more light pathways than the current product does and can therefore potentially provide more accurate solutions.  Two "tricks" which are used in the first two engines, transparent shadow rays and daylight portals, are not used in these new engines.  This gets rid of two big sources of inaccuracy.  Caustics pathways are automatically included.

Engine 2 can be much less noisy than the Path Tracer for most interiors.  It's convergence, on the other hand,  is not as graceful and will include some discrete artifacts.  It's usually a lot faster than the Path Tracer for interiors.

Engine 3 is a little more accurate than Engine 2, particularly when window coverings are involved.  It converges more gracefully, but slower for some interiors.  It is considerably faster on some exteriors.

Some things to keep in mind with these engines:

  • Light leaks in the corners are possible when doing interiors.  Make sure walls, floors and ceilings are modeled as slabs with thickness.
  • Both engines start slowly and accelerate.  Pixels/sec should increase as they proceed.
  • Using accurate IORs is very important.  IORs of 1.00 should not be used for glass.
  • Designating glass as Thick/Thin is more important with these engines.
  • Translucency is not implemented.  Allow Surface Roughness is.
  • These engines use more memory than the previous two.  64 bit is recommended.  Start your testing and low resolutions.

Let me know what you think-- I'm looking for feedback here.


Views: 3739

Reply to This

Replies to This Discussion

Roy, one question,  is better to draw slabs with thickness instead of extruded solids to avoid  light leaks with this version?

Regards,

Alejandro

It doesn't matter.  You need to avoid 3dface type objects-- thin objects -- particularly when these occur at a boundary between inside and outside.

And to simulate the glass of windows, could we use 3DFaces? As the light have to pass through the material...

Yes-- just make sure it's tagged as Thin.

more quality ..but more slower...in the beginning...

Roy, I am trying to load any of the new engines and I d´ont found any lsp command. Where is located? or I am doing something wrong?

(nxtengine 2)

At the command prompt.  nXt must be loaded first.

should we turn the path tracer on or off or will that make no difference

It doesn't matter.  Checking or unchecking the box will set either engine 0 or engine 1-- leave it alone if you want to try the new stuff.  (nXtEngine) all by itself will tell you what the current engine is.

I just found a problem w/ Engine 2-- I'll upload the fix this evening.  It's working much better on exteriors now.

Okay-- it's fixed and uploaded.  If you've grabbed 291 go back to the well and get the current one (292.)

Do not found the 292

 

RSS

Search

Translate

Latest Activity

James Bloomer posted photos
May 1
Roy Hirshkowitz commented on Maciej's photo
Thumbnail

c3

"No license yet. Send some results when you can-- might be easier as a forum post instead of this comment section."
Apr 7
Roy Hirshkowitz commented on Maciej's photo
Thumbnail

c3

"The drawings are likely scaling correctly-- don't scale the geometry please. These are only display units for the arstudio interface."
Apr 7
Maciej commented on Maciej's photo
Thumbnail

c3

"You were right, Roy. It was about the file name - ash on my head. ARStudio seems to be very ok for my humble interiors' purposes. One minor point (see attached) - meters or millimeters only, what about centimeters? I need to scale all my…"
Apr 7
George Ioannidis commented on Maciej's photo
Thumbnail

g2

"Yeah, I know, usual situation. :)"
Apr 7
Roy Hirshkowitz commented on Maciej's photo
Thumbnail

c3

"Looks like there's no file name.  Try saving the drawing to a file first, then run ArStudio.  This is a bug, obviously.  Thanks."
Apr 7
Maciej commented on Maciej's photo
Thumbnail

c3

"I followed all the instructions and that is what I see now...Life is a struggle... Is there something I did wrong? AutoCAD 2013, nXt 0358-SG17, Windows 7"
Apr 7
Roy Hirshkowitz's discussion was featured

AccuRender Studio

Here's the latest version of the new stuff.  If you're interested, try it at your leisure and let me know what you find.  It's a work in progress, so please be kind.  We'll likely have some bugs and certainly have some missing features.******Some highlights:Standalone renderer which accepts input from Rhino, Sketchup, Obj and FBX.Plugins for AutoCAD and other CAD applications.Online material and plant…See More
Apr 7

© 2020   Header image courtesy Peter Milner   Powered by

Badges  |  Report an Issue  |  Terms of Service