Change fog density and global illumination

Hello amazing modders!

I am in need of help here. I just started modding on MCreator and love the fog option for the dimension element however I would like to change its density (to be even more dense).

Here is where the fog settings are located in the code:

		@Override
		@OnlyIn(Dist.CLIENT)
		public Vec3d getFogColor(float cangle, float ticks) {
			return new Vec3d(0.4, 0, 0);
		}

		@Override
		public ChunkGenerator<?> createChunkGenerator() {
			if (this.biomeProviderCustom == null) {
				this.biomeProviderCustom = new BiomeProviderCustom(this.world);
			}
			return new ChunkProviderModded(this.world, this.biomeProviderCustom);
		}

		@Override
		public boolean isSurfaceWorld() {
			return true;
		}

		@Override
		public boolean canRespawnHere() {
			return true;
		}

		@OnlyIn(Dist.CLIENT)
		@Override
		public boolean doesXZShowFog(int x, int z) {
			return true;
		}

And second question is how do I change the amount of global illumination? When activated everything is dark nearly pitch black. I would like to have it less dark.

I'm trying to create a mystical dark forest. Everything happens in a dimension I created where it's constantly night.

What it looks like for now: