Multiple Lights Not Working Shadow Map Atlas - Browser / HTML5

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Description Shadow Map Atlas is not working with multiple lights when targeting HTML5. Under those conditions shadows will break when rendering

To Reproduce Add multiple lights to the scene and some objects, select Runtime -> Browser, enable Shadow Map Atlasing under Armory Render Path -> Shadows, play.

Expected behavior

System Blender: 2.83.10 Armory: latest commit OS: Ubuntu 20.04.2 LTS Graphics card: AMD RX 480 (mesa drivers)

[N8n5h]

The changes I pushed for armory and iron should solve the issue with sun, with browser (at least by circumventing it with the way you found with the “double inversion”) and remove the need of the inversion of the shader to save some gpu cycles, please test it out and tell me if I can open a PR @Naxela 👍

Edit: I pushed another commit to iron to support sun with 1 cascade too.

[N8n5h]

Hi, I tested it and it seems to work for Browser now, but it seems to break on Krom (Windows):

Oops, yeah I forgot to check and add for DirectX too 😅 …

I managed to get it working by adding the direct3d11 for the flip y condition along with HTML5 (write_data.py):

https://gist.github.com/Naxela/361a35b3f604114c729ee756ba8db6fd#file-write_data-py-L537

As well as conditioning out HLSL in shadows.glsl:

https://gist.github.com/Naxela/e2544dbea31cc784ea143c8860e47c5a#file-shadows-glsl-L49

Nice! If you don’t mind I will copy what you did and push another commit and open a PR.

I hope it doesn’t break anything on Linux?:

I’ve checked and HTML5 and Krom openGL works 👍

I think basic light types should work across all targets now, possibly?

Maybe… AFAIK It’s still untested in MacOS with Metal, Safari (not sure if it’s a supported target though), other non-chromium based browsers, Linux © (which I’ve tried but I get this https://github.com/armory3d/armory/issues/2067 even with the default cube), Windows ©, Android, and others that I’ve possibly forgotten.