AccuRender nXt

advanced rendering for AutoCAD

"I'm usually rendering fairly detailed AutoCAD architectural models on 3D
modeled sites with lots of AccuRender trees and shrubs.  I was wondering
what AccuRender 4 (using Acad2004) and AccuRender nXt (using Acad2011)
actually "sees" when you select a view to render.  Do they "see" and have to
"consider" the 50 trees behind the building (adding a lot of calculating
time to a rendering), or do these programs "hide" and never consider the
stuff that's hidden in a view by other entities?"

Everything in the models takes time to render, so we recommend you use images for background trees, and only use fractal trees for tree for which the additional detail will make a difference.

The 3D Fractal Plants show more and more detail, the more you zoom in on them.

But for plants which are in the background, the 2D images work well and save considerable rendering time.

Here is a rendering of two plants - zoomed in - the one on the left is rendered as a 2D image, the one on the right is rendered as a 3D, Fractal plant. If you look closely you can see the better detail in the 3D, Fractal plant.

Rendered plants.jpg

However, when these two plants a zoomed out a bit the difference is almost not noticeable.

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Sounds like good method... something I need to look into as I've never used tree images.

Assuming I want to continue working the old way using only fractal trees... Does AutoCAD and AccuRender take time to calculate trees hidden by buildings etc?  I can see from the on-screen messages that go by, that the first step AccuRender does is to change all the AutoCAD render-able objects to faces.  I assume it converts all the objects in the model (including the hidden stuff).  Does it then use the "front row" of faces to hide the "back row" of faces?  If that's the case, I can see that turning off the trees that are hidden would save a lot of time.  (But then again... I charge by the hour!  Just kidding... I don't like wasting time.)

nXt doesn't really work like that-- all of the objects need to be taken.  An object which is hidden from view may show up in a reflection, a shadow, refracted through glass, contribute to diffuse reflection of light in the scene, etc..  

OTOH turning off objects which don't participate does not usually save a lot of time unless you are in a low-memory situation.

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Roy Hirshkowitz posted a discussion

AccuRender Studio

Starting a new thread...Latest version of AccuRender Studio is here.  Among other changes:ArStudio command automatically loads the model and begins interactive rendering in addition to bringing up the Control Panel palette.Decal interface has been redone to include multiple decals and cylindrical projections.Legacy data is being handled a little better.See More
Nov 19
Peter Milner replied to Roy Hirshkowitz's discussion AccuRender Studio
"Thanks Roy. That did the trick. I just have to wrap my head round the logic behind it."
Nov 11
Roy Hirshkowitz replied to Roy Hirshkowitz's discussion AccuRender Studio
"Here's how you adjust the overall transparency--  Edit the Decal material in the Material Editor. Go to Opacity and change it to 0 using the slider (I may do this automatically at some point). Edit the Opacity Map (not the Color Map) by…"
Nov 10
Roy Hirshkowitz replied to Roy Hirshkowitz's discussion AccuRender Studio
"Strength is supposed to do that-- I'll verify.  I'm working on a few things right now-- should have a build for you by tomorrow or so.  Some legacy items are not persistent, including materials (you should only need to have the…"
Nov 10
Peter Milner replied to Roy Hirshkowitz's discussion AccuRender Studio
"Also, when I reduce the strength of the decal, instead of becoming transparent, it becomes grey. How would I set it to show some base material coming through?"
Nov 10
Peter Milner replied to Roy Hirshkowitz's discussion AccuRender Studio
"Adding the decal from fresh using ARDECAL worked, even with my version. Next question: how do I add more than one decal to an object?"
Nov 10
Brittany Watson posted a discussion

Velvet Material

Hi, I am wondering if anyone has suggestions to how to create a decent velvet material (its for curtains).See More
Nov 5
Roy Hirshkowitz replied to Roy Hirshkowitz's discussion AccuRender Studio
"Sorry-- I was out of town for a few days. You should be able to replace the decal using the ArDecal command and it will handle everything automatically-- just use the png provided. -OR-- If you want to use the material editor you'll need to…"
Oct 30

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