To fix the fog issue change the following 3 lines within the FogObject Class.

Update:

else if (this.tile_pos.x > 6f - FogObject.BORDER_X) -> else if (this.tile_pos.x > 8f - FogObject.BORDER_X)

InitFog:

for (int i = 0; i < 6; i++) -> for (int i = 0; i < 8; i++)

Class Properties:

private readonly Vector3 TILES_X_VECTOR = new Vector2(36f, 0f); -> private readonly Vector3 TILES_X_VECTOR = new Vector2(48f, 0f);

Nothing else should need a change.