(node:15072) UnhandledPromiseRejectionWarning: Shader compiler error. (node:15072) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 2)

[ItsCubeTime]

Exporting Scene
Scene exported in 9.148s
Info: For Armory to work correctly, you need Blender 2.83 LTS.

C:\Users\Oliver\Desktop\build_Armory3Dtest\debug\temp\Cloud_003_shadowmap.frag.hlsl(98,43-58): error X4000: variable 'dotNV' used without having been completely initialized

Compiling shader 4 of 27 (Cloud_003_shadowmap.frag.glsl) failed:
Shader compiler error.
(node:15072) UnhandledPromiseRejectionWarning: Shader compiler error.
(node:15072) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 2)
(node:15072) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
Finished in 42.953s
ERROR: Build failed, check console

First time using Armory, I do have some relatively complex shaders in the scene, are there shader nodes that I need to avoid/arent supported?

[ItsCubeTime]

Also seeing errors attempting to play the playground and tank demos with blender 2.83 LTS & the latest SDK from the website:

(This is for the tank demo)

[MoritzBrueckner]

Hi, please make sure to use Blender 2.83 LTS. We're working on 2.9 support and I guess that it will be finished for the next SDK version, but it is not yet supported. That's where the second error message AttributeError: 'RigidBodyWorld' object has no attribute 'steps_per_second' comes from.

Regarding the first error: could you please open an issue with a minimal example file? The material that's causing this bug is probably called Cloud.003.

are there shader nodes that I need to avoid/arent supported?

There are unsupported nodes, but if you use them, there should be a warning message printed to the console to inform you. Here you can find a list of supported material nodes.

[ItsCubeTime]

Hi and sorry for the insanely late reply on my end :)

I opened an issue here #2186

Also great work on getting Blender 2.9 LTS ready, really appreciated.