ADVISE: Very Large Revit model to animate

[philip kelly]

Good morning.

I have a very large Revit Model and I want to animate a walkthrough.
I have been given the path and the revit models are very big.
There will be a building then all the manufacturing elements also to go in it, there will be multiple parts to include.

So my questions are :

1 .Are there any script or plugins out there people use to clean up a large Revit file?
2. Should I use corona or Vray and Export as a mesh to Vantage and Animate it that way?
I recone the speed required there will be about 4000-5000 frames.

Advise would be grateful.

Thank you

Phil

[philip kelly]

Somebody must be using very large revit files here, anmy advise on how to handel them efficently.I am finding even opening 2020 revit files of 600mb in Revit 2023, is taking hours.
Is this normal?

[glorybound]

Clean them up. I just worked through one, and this script helped a lot.

https://vizguy.com/revit-to-max-pro/

[francomanko]

doesnt 'sini tools' help with this?

[dean_dmoo]

Depending on the size of the project, the amount of (unnecessary) elements in the model, the LOD of the models and the quality of the model (as in does geometry between building elements actually match up) it might be worth rebuilding when having to animate.

Exteriors are ok to do, but interiors are a bit of a nightmare for us and cost as much time to fix as just rebuilding from scratch with our own higher quality 3d models. I just wouldn't trust a revit model for clean animations if multiple people and firms are working in a single model.

Somebody must be using very large revit files here, anmy advise on how to handel them efficently.I am finding even opening 2020 revit files of 600mb in Revit 2023, is taking hours.
Is this normal?

We recently had one that took 45min, but that was down to the auto upgrade it has to do from 20 to 23. It is also worth opening in the version it was made and cleaning up any unneeded links (dwg/rvt/ifc). Sometimes you have all kinds of files linked in (also linked in the linked files).

[glorybound]

doesnt 'sini tools' help with this?

Yes, it does. I also have to join things to detach by material ID. The issue is when the same material is used repeatedly, all with different IDs. I can get hundreds of Windows with the same glass, but the glass is on random material ids. Depending on the size and complexity, I tend to model from scratch. I request the 2D CAD, always.

[philip kelly]

Thank you very much for the replies.
They are very much appreciated.
Ys Opening files downloaded from Buzzsaw ansd then trying update them takes hours as they are linkned to amsster files and numberous other fikles also.
The go up to 1.9gb files, I am sure there is structure ext in that and all sorts of interoir machinary.
Pharma project, so you can imagine the complicated machinery involved.

I am going to ask the tream on it to fbx the files out for me and I will get in it inat least and rebuilt what I need.

An other question............
What would you render the animation with?
Corona and sit and wait.
Or Vray and Vantage.
I have a RTX 2070, and I am thinking of upgrading to RTX 3080, as the 3090 are very expensive and 10-20% faster thats all.
Any opinions on that?
Thanks again.

phil

[glorybound]

I wouldn't attempt to animate a Revit model; you'll drive yourself crazy. Flipped normals, double geometry; it is a nightmare. This is my opinion, of course. Let us know how it goes. I would love to see the final deliverable.

[francomanko]

I have a RTX 2070, and I am thinking of upgrading to RTX 3080, as the 3090 are very expensive and 10-20% faster thats all.


phil

Big difference in ram between the 3080 and 3090.

[Mr.Mxyzptlk]

No amount of hardware is going to prepare you for what glorybound mentioned. Revit models are a nightmare for all the reasons he mentioned.

[Vizioen]

Yeah I had my fair share of Revit models, cleaned them up to because modelling an 800 room hospital with operating theaters and all wasn't feasible alone. Back in the day you didn't have SINI tools to help with this process so it was quite tedious relying on lots of other scripts, to merge same/similar materials, detach/attach objects with same materials. Everything is editable meshes too when importing from Revit. When you have round columns or whatever, those are shit when converting to editable poly. It takes a lot of trial and error. But it's manageable if you don't require an exquisite model.

But the very first thing to check in the render settings is Secondary Ray Bias, and raise it to 0.001 or something to avoid Z-fighting with double faces.