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  • Paul Walker
     
    Lee Mullin

    Dace Campbell
     
    Thomas Schwaiger

    Shawn Butler
     
    Pete Billante

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12/04/2012

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Lee Mullin

Hi George, please do, can you email them to beyond.design@autodesk.com and let us know if we can use them on the blog?

George RL Young

At our office we applied the settings as suggested in the article and were quite pleased with the results. As stated there is drop-off during navigation of larger model sets, but it's bearable. Can I forward you image examples?

George RL Young

At our office we applied the settings as suggested in the article and were quite pleased with the results. As stated there is drop-off during navigation of larger model sets, but it's bearable. Can I forward you image examples?

Lee Mullin

Hi C M,

Sorry to hear that you don't find the implementation suitable. I passed these comments onto development and our implementation is very similar to that of Revit's with a couple of minor changes, so we're surprised at the result you're getting.

Do you have the same model that you can run side by side in Revit and Navisworks and take appropriate screenshots. If you notice significant differences can you email them and the model to beyond.design@autodesk.com

C M

Sorry, meant ambient occlusion, not occlusion culling...

C M

Lee,

The occlusion culling is much needed in Navisworks, but without wanting to sound overly critical as it stands I don't think it's ready for use and the developers need to go and talk to the Revit team.

There are a couple of main problems with it:

1) Large flat surfaces (seems to affect vertical, not horizontal) can become almost black when viewed at certain angles - for some when viewed parallel to the camera, for others perpendicular. For these surfaces the occlusion culling also seems to make the faces dark towards the centre, not towards the edges as it should.
2) Occlusion culling should be completely ignored for transparent surfaces.

In addition, the extent of the effect on appears to be something like a fixed number of pixles, meaning that as you walk towards or away from faces the shadows change in size relative to the faces - it would be better if the effect was a fixed model size.

Lee Mullin

Thanks Rick and Duncan.

As mentioned in the article, there can be a detrimental effect on performance as this will draw on the CPU as opposed to just the graphics card. On smaller models this will be negligible, larger models however you may get increased drop out. Try it out and let us know how you get on. Regarding materials from Revit, this is currently only possible via FBX, we do hope to have this in a future release though.

Lee

AGDunc

Really impressed. I would like to know how to get any materials applied in Revit to carry through for Navis to use with this driver. Do you have to take it through as an FBX file?

Rick Khan

This looks great. What does this do to rendering refresh performance? Most folks are using Laptops with NavisWorks and on a large dataset, it could bring us to our knees...
Cheers,
Rick

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