depth to ViewSpacePosition(4.3+)

Get the view space position from the DEPTH_TEXTURE (4.3+).

Apply this shader to a quad, which is attached to the camera.

Shader code

shader_type spatial;
render_mode unshaded, depth_draw_never;

uniform sampler2D DEPTH_TEXTURE: hint_depth_texture;

void fragment() {
	vec4 clipSpacePosition = vec4(SCREEN_UV * 2.0 - 1.0, texture(DEPTH_TEXTURE, SCREEN_UV).r, 1.0);
	vec4 viewSpacePosition = INV_PROJECTION_MATRIX * clipSpacePosition;
	viewSpacePosition /= viewSpacePosition.w;
	ALBEDO = viewSpacePosition.rgb;
}

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