ArgumentException: get_fog can only be called from the main thread

Question

i get this error. does anyone know how to fix it?

ArgumentException: get_fog can only be called from the main thread. Constructors and field initializers will be executed from the loading thread when loading a scene. Don't use this function in the constructor or field initializers, instead move initialization code to the Awake or Start function.

here is the script

//This script enables underwater effects. Attach to main camera.

//Define variables
var underwaterLevel = 7;

//The scene's default fog settings
var defaultFog = RenderSettings.fog;
private var defaultFogColor = RenderSettings.fogColor;
private var defaultFogDensity = RenderSettings.fogDensity;
private var defaultSkybox = RenderSettings.skybox;
var noSkybox : Material;

function Start () {

 //Set the background color
 camera.backgroundColor = Color (0, 0.4, 0.7, 1);

function Update () {
    if (transform.position.y < underwaterLevel) {
        RenderSettings.fog = true;
        RenderSettings.fogColor = Color (0, 0.4, 0.7, 0.6);
        RenderSettings.fogDensity = 0.04;
        RenderSettings.skybox = noSkybox;
    }

 else {
     RenderSettings.fog = defaultFog;
     RenderSettings.fogColor = defaultFogColor;
     RenderSettings.fogDensity = defaultFogDensity;
     RenderSettings.skybox = defaultSkybox;
 }

Answer 1

Best Answer

Answer by · Jan 11, 2011 at 05:00 AM

Searching the error revealed two similar issues:

Eric's answer is more relevant for your Unityscript:

Code outside of functions should stick to declaring types or specific values only. Instead of

private var attackTime = Time.time;

use

private var attackTime : float;

Basically, you can't store 'RenderSettings.###' from outside of a function. Set the values in function Start() and the error should disappear.

Your code should look something like this. It's untested, but I checked the types against the RenderSettings Script Reference, so it should be fine. Please comment back if you have trouble.

//The scene's default fog settings var defaultFog : bool; private var defaultFogColor : Color; private var defaultFogDensity : float; private var defaultSkybox : Material; var noSkybox : Material;

function Start () {

 defaultFog = RenderSettings.fog;
 defaultFogColor = RenderSettings.fogColor;
 defaultFogDensity = RenderSettings.fogDensity;
 defaultSkybox = RenderSettings.skybox;

 //Set the background color
 camera.backgroundColor = Color (0, 0.4, 0.7, 1);

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zeuo · Jan 11, 2011 at 06:11 AM 0

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i know that u have to do that but i dont know how to do it. i tried moving all of the private var stuff into the function start but that did not work

· Jan 11, 2011 at 11:51 AM 0

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I've updated the answer with example code. As an aside, it seems pretty inefficient to be setting the RenderSettings every frame. Perhaps you could check if you were underwater last frame, before applying the new settings.

zeuo · Jan 14, 2011 at 06:19 PM 0

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it workss tyyy u soooo muchhh

Ckmlee · Mar 16, 2013 at 05:42 PM 0

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i know nothing about scripting, and is a newbie in Unity. I tried the codes u have and it says the name 'bool' does not denote a valid type ('not found'). So do I need to set the type in the beginning? How can I do that?

dinhxuanhop · May 09, 2013 at 03:06 AM 0

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thanks a lot

ArgumentException: get_fog can only be called from the main thread

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