Wrong shadows when use VIEW_MATRIX in VERTEX calculation

[BasilYes]

Godot version

v4.1.1.stable.official [bd6af8e]

System information

Godot v4.1.1.stable - Windows 10.0.22621 - Vulkan (Forward+) - integrated AMD Radeon(TM) Graphics (Advanced Micro Devices, Inc.; 31.0.12018.5) - AMD Ryzen 5 5500U with Radeon Graphics (12 Threads). Same on Fedora 38

Issue description

When I use VIEW_MATRIX to calculate VERTEX, shadows dont effected by this.

shader code

shader_type spatial;


void vertex(){
	VERTEX = (vec4(VERTEX, 1.0) * VIEW_MATRIX).xyz;
}

Steps to reproduce

Just apply this shader, to any mesh and it's will broke shadows

shader_type spatial;


void vertex(){
	VERTEX = (vec4(VERTEX, 1.0) * VIEW_MATRIX).xyz;
}

Minimal reproduction project

ShaderResearch.zip

[clayjohn]

This is a duplicate of #41420

The issue comes from the fact that the VIEW_MATRIX used by the shadow calculations is the light's VIEW_MATRIX, not the camera's VIEW_MATRIX.

There is already a PR to fix this: #72638