Moving from 1.54.3 -> 1.56.1 only closest light is shown?

[poweifeng]

Discussed in #8289

^{Originally posted by tcadanklefsen December 2, 2024}
Hello,

Moving from 1.54.3->1.56.1 seems to have changed drawing to only show the closest light. Here's where I was at previously:

20241120_092802.mp4

and here's where I'm at now:

20241202_140206.mp4

Any thoughts on what might have changed and where I could start investigating?

[poweifeng]

Noted in #8289, that

1.54.5 works, 1.55.0 does not - continuing to look.

This implies that this might be due to the descriptor set change.

[poweifeng]

@tcadanklefsen, can you elaborate on which backend (gl or vulkan) and platform (linux e.g) you are running on?
And as mentioned in the discussion, if you can provide a small repro app, it'd greatly help us to debug.

[tcadanklefsen]

Thanks, this uses Vulkan backend. Right now this uses a dart+native code in a large open source project; so its not entirely a small repro ;/

https://github.com/toyota-connected/ivi-homescreen-plugins/tree/v2.0/plugins/filament_view
https://github.com/meta-flutter/playx-3d-scene/

This is tested on ubuntu 20 and fedora 41 (Fedora we've hit a couple other issues that we're looking into separately) - and setup is done through here: https://github.com/meta-flutter/workspace-automation/ (if you're wanting the large repro case).

I'll work on putting together a smaller repro case.

If there's anything you want me to try and edit in filament code base I can try over here and report back as well.

[tcadanklefsen]

Good news, I was able to get it to happen in the lightbulb sample without changing anything:

Building:

cmake ../ -DCMAKE_C_COMPILER=/usr/bin/clang -DCMAKE_CXX_COMPILER=/usr/bin/clang++ -DFILAMENT_SUPPORTS_VULKAN=ON -DFILAMENT_ENABLE_LTO=ON -DFILAMENT_SUPPORTS_OPENGL=OFF -DFILAMENT_BUILD_SAMPLES=ON -DFILAMENT_SUPPORTS_WAYLAND=ON -DFILAMENT_SUPPORTS_X11=OFF -DFILAMENT_SUPPORTS_XCB=OFF -DCMAKE_BUILD_TYPE=Release

Running:

./lightbulb -d -p -a vulkan -m assets/models/monkey/monkey.obj

20241203_152815.mp4

[pixelflinger]

that's strange, I'm not seeing the problem on the mac + moltenvk.

do you see the same issue with -a opengl ?

[tcadanklefsen]

I'm assuming opengl + wayland isn't supported?

cmake ../ -DCMAKE_C_COMPILER=/usr/bin/clang -DCMAKE_CXX_COMPILER=/usr/bin/clang++ -DFILAMENT_SUPPORTS_VULKAN=OFF -DFILAMENT_ENABLE_LTO=ON -DFILAMENT_SUPPORTS_OPENGL=ON -DFILAMENT_BUILD_SAMPLES=ON -DFILAMENT_SUPPORTS_WAYLAND=ON -DFILAMENT_SUPPORTS_X11=OFF -DFILAMENT_SUPPORTS_XCB=OFF -DCMAKE_BUILD_TYPE=Release

./lightbulb -d -p -a opengl -m assets/models/monkey/monkey.obj

Output:

FEngine (64 bits) created at 0x20b966e0 (threading is enabled)
FEngine resolved backend: OpenGL
Selected backend not supported in this build.
Segmentation fault (core dumped)