Invalid get index 'omni_range' (on base: 'Nil').

[WilliamTambellini]

To prevent an exception/error if the parent light is a spotlight:

Godot-God-Rays-Plugin/addons/SIsilicon.vfx.godrays/GodRays.gd

Line 62 in 7a04b00

material.set_shader_param("size", light_size * (light as OmniLight).omni_range)

Switch:

material.set_shader_param("size", light_size * (light as OmniLight).omni_range)

to

if light is OmniLight:
	material.set_shader_param("size", light_size * (light as OmniLight).omni_range)

or similar similar (warning, ...)