Limitation on Adding number of cars (cubes) to the Sionna scene

[Ershadh]

I have created an environment of Urban Macro Setup with roughly a 1000 buildings in a 1000 m x 1000 m area.
Laid 4 roads on x any y axis which are evenly placed across.
Number of cars I added 15. The cars are represented in the form of plain single component cubes.
When I tried to add any number above 15, the server hangs.
Note: With the 15 cars and all the other elements in the setup the code is still not heavy and finishes scene creation in less than a minute.
It's only the number of cars which are making it heavy.
Can someone tell a workaround for this to include as much as 50 cars in the environment?

[merlinND]

Hello @Ershadh,

It's difficult to say without a reproducer (complete scene, including meshes + code). Please also make sure that you are testing with the latest version of Sionna.

the server hangs

When does the server hang (i.e. what code specifically is it executing when you observe it hanging)?

Do you use a GPU, or run on the CPU?
Have you checked memory usage with 15 vs 16 cars? (although running out of memory should result in a crash, not a hang)

[Ershadh]

The Sionna version I'm using is 19. However, the problem is that the scene itself is not rendering in the blender.

I suppose this query is more about blender and less about Sionna.

However, to answer your queries, I'm using a GPU. Memory usage while rendering >15 cars are around like 50-60 GB.

Thank you Merlin for the response.

[merlinND]

Memory usage of 50-60GB sounds high (depending on how much memory your system has).

the server hangs

So did you mean that Blender hangs, or that Sionna hangs?
We cannot offer support for Blender here.