Topic: [Resolved] Limitation of mesh import in Lumion?

[KASK]

Hello,

At school we use the Lumion EDU version, we did a 3D outdoor scan of a building where the students have to make a new concept. The pointcloud is converted to one mesh to .fbx, gives good result in 3DS max but import give a transparant box in Lumion, the mesh is very big ( 14 mlj triangles, around 800 MB and one texture UV map from 300 MB, 16.000 px ).
Has Lumion some sort of limitation to import 3d models?

I can always send a link to download the 3D model...

Regards
Vincent

[Morten]

Hi Vincent, we can definitely take a look at the model.

Please click here to provide us with the missing information and the FBX and MAX file.

Thanks in advance.

[Morten]

Thanks for uploading the files.

I have asked our import/export developer to take a look.

[peterm]

Hi

Thought I would take a look whilst our import/export developer is busy.

I can import the FBX file here OK (v 6.5.1).  Takes about 10 minutes.  I was also able to import it to 3ds Max (2016) then export that to another FBX and also OpenCollada DAE file.  Those also imported OK.

I note that the original FBX file imports at considerable more file space (1.37GB compared to 833MB), and observed that it does require up to the maximum memory my PC had (16GB) at one stage of the import process.

Vincent, what are the PC specifications you tried to import with?  Attach to a post the Lumion DXDiag Report. Refer our Knowledge Base Article: How do you attach a DXDiag report to a post?

[KASK]

Strange, looks like the problem is the PC, not the file.

[Morten]

Hi Vincent, the Quadro K2200 isn't the fastest graphics card out there but it's got 4GB memory and your PC has 32GB system memory.

Peter opened the FBX file on a PC with less system memory and the same amount of graphics card memory.

In other words, something on your PC is preventing Lumion from using all of the available memory.

Fortunately, we know exactly what that "something" is - thanks to your attached DirectX diagnostics file.

To resolve the problem, please follow the instructions in this Knowledge Base article and let us know if that helps.

[KASK]

Well, did a LOT of windows updates and it seems t work now.
So Lumion used the GPU also for importing files in stead of the CPU? The amount of RAM memory is used for what then?

[Morten]

Hello again, Vincent.

Your Quadro K2200 has got 4GB onboard memory which Lumion will fill up first.

Once the graphics card memory is full, it will use any available system memory, i.e. 32GB minus however much Windows and other open applications are using. This type of memory is a bit slower than graphics card memory, so you'll notice minor delays when turning the camera quickly from side to side as models and textures have to be transferred back and forth between the graphics card memory and the system memory.

Once the system memory is full, it will use virtual memory (The page file on the harddrive). If this occurs, you'll notice that the PC gets quite sluggish/unresponsive. If the PC also runs out of virtual memory, Lumion will eventually crash.

On your PC, Windows and the graphics card driver were out of date which meant that Lumion couldn't use the 3 different memory types. This typically causes performance issues, crashes, glitches and other unexpected behaviour (there's more information in this Knowledge Base article).

However, now that you've updated everything you should be good to go!

[KASK]

Indeed, we had this similar problem at school, good to know and thanks for the good explanation !

[Morten]

No problem.

Let us now if we can help with anything else.