AccuRender nXt

advanced rendering for AutoCAD

I've just started using nXt in the last month, but have used Accurender since 2004.

I'm trying to get a handle on render time and the use of lights.

The attached image is a reasonable example of both.

1) This image is set for 3072X2304 pixels. 28 passes took 24 hours and 12 minutes. This is a little higher res than we usually use for web presentation but the same question applies: what can I do to reduce render time?

2) There's something about the math for lights turning on that I'm missing. The light in the service counter under the "u" in "cmu" failed to turn on. it's a duplicate of all the ones on either side of it, which DID turn on. With 140 lights in the image, I figured by pass 18 they should all be on if I'm running at 8 lights per pass.

Thanks,
Ron

Views: 115

Attachments:

Reply to This

Replies to This Discussion

As a thumb rule always render small resolution which are always faster first. When all your settings are to your satisfaction, then go big time.
Thanks. That's what I've been doing generally. I honestly can't remember whether this light came on in the lo-res version or i just figured it would. i'll watch more carefully.
For web presentation you should be rendering at 1024 x 768. This will speed things up a lot.
Blurry reflections and blurry transparency are 2 of the biggest factors that can slow a render.
Use glossy materials instead where you can, particularly for small details.
With 140 lights you'll need several hundred passes for some of the reflections to start resolving.
Turn off any feature lights that can't be seen in the render view unless they're contributing significantly to the overall ambient light.
Nice image. All of Peter's suggestions are very good ones.

The time will vary approx. linearly with the number of pixels-- so a 6 megapixel rendering like yours will take 6 times as long as a 1 megapixel image which is usually more than adequate for web-based work.

I suspect the light in the service counter is working fine-- it's just sampled a different point on the light will fill in after more passes. (Just guessing here)

Another way to save some time is to render without the plants in the background. You can render a background separately and alpha composite things in.

The Path Tracer may also be a good choice here-- in that case I'd leave the plants in. If you want to share I can try this model out here-- use the Upload a File item under Support if you're so inclined.
I know it is not directly related, but - it does not seem you use pathtracer engine, which should be better for this application ... passes took less time, but you need more of them... in fact it speeds up the whole process, because you get to know mistakes in your setup earlier...

RSS

Search

Translate

Latest Activity

cesar eduardo martinez torres posted photos
Monday
OYEBANJI EMMANUEL replied to Roy Hirshkowitz's discussion Cloud Rendering
"I am interested in you adding a render farm service but please bring the price down by 70% especially for those of us who need to render walkthrough animations. Thank you Sir."
Sep 20
OYEBANJI EMMANUEL posted a photo
Sep 2
Sergio88 replied to Peter Milner's discussion Windows 11
"Hello,I have buy a new licence version XE08w 1.0, and installed it on my new Windows 11 machine with AutoCAD 2021. All problems are now solved, it works fine. Renders are 10 times faster on this new machine."
Jul 24
Sergio88 replied to Peter Milner's discussion Windows 11
"Hello, I have a lot of problems with the nXtRender plugin for AutoCAD with AutoCAD 2021 under Windows 11 installed on a new machine (no problem with the same dwg's under windows 10) : - material applyed are not rendered. I have to explode…"
Jun 5
OYEBANJI EMMANUEL posted a discussion

Questions for nxt render for autocad

Good day everyone,Can anyone here help me with these issues i keep having with nxt render for autocad ?1. How do you bring in textured models into autocad ( 3ds and obj) without losing their textures or having to re-assign them.2. How do you move these objects from place to place without experiencing viewport refresh sluggishness in the autocad viewport ?3. How do you add dirt to fabric textures for rendering.4. How do you avoid repeat patterns in textures for rendering ?See More
Jun 4
George Ioannidis commented on Maciej's photo
Thumbnail

V01 - dark 02

"Those are all very nice pictures Maciej, well done! Are those renewed older buildings or new housing development?"
May 25
Maciej posted photos
Apr 16

© 2024   Header image courtesy Peter Milner   Powered by

Badges  |  Report an Issue  |  Terms of Service