20090609

Top 20 Slowest Revit Rendering Appearances

I recently got a question about "a matrix that compares each level of rendering (draft, low, medium, high, best) relating to rendering within Revit Architecture." While I don't have a matrix, I do have a data set that identifies specific sources of the biggest render slowdown: material choice. For instance, in a sample test scene with only one material applied, here are relative speeds for the 20 SLOWEST materials.


Notice that the most off-the-charts intensive materials are perforated metals. Those making colander buildings take note!

The complete spreadsheet can be downloaded from here. There's a lot of information embedded in this doc. The big takeaway is that, while the amount of geometry in the scene has very little impact on render time, the material choice has a huge effect. Second, you can get a sense of how big a time hit you are looking at taking if you jump from a "High" quality image to a "Best" quality image. There is no information in this set relative to lighting, but this would also make an interesting spreadsheet.

Fastest Material Appearance? Mirror, no tint. Lets see some Disco Balls, people.

8 comments:

  1. Great info Zach! We get asked this all the time when visiting customers.

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  2. Sorry mate, but it doesn't make sense. I can't find any way to apply this form, Do you suggest that change the timber material to mirror in order to render faster? NO.

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  3. Victor, You have to look at comparable materials. Example: If you are thinking of using a brass finish and aren't particular about the difference in the rendering between Brass Satin (20min 7sec rendertime) and Brass Satin Brushed Heavy (10 min 46sec rendertime), which would you choose?

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  4. Another way to look at this: make sure that the high rendering time materials in your scene are really necessary for the image. If you are making early concept renderings and you want a bunch of fast studies, don't use things like perforated metal and chain link fence.

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  5. Zach, Thank you very much for the quick reply.
    I will try to reduce rendering time base on your recommend next project and see if it help. Nice weekend!

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  6. HOW CAN I CREATE A EYEBROW ARCH OPENING FAMILY ON A CURVED WALL.
    I WILL APRECIATE IF YOU CAN HELP ME..
    LEVENT@GLUSHDA.COM

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  7. but what are your system specs?

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