How to make a game object appear, when another game object is clicked?

Questions & Answers
1

Sorry for the amateur question,

but for my Main Menu, when “Play” is pressed (which by the way is a Plane), i’d like two more planes to appear (preferably fade in). How exactly would I go ahead and do that?

2

A few ways to do this, I’ll try to give you the simplest. Create your 3 planes in the editor. Make the plane you are going to click the parent of the 2 planes that will be invisible at first. Disable the mesh colliders for the invisibles. Then attach a script to your “main” plane, and use an [OnMouseDown][1] function. In this function, since your other two planes are the children, use [GetComponentsInChildren][2] to find the [MeshRenderer][3] components in each. On startup, set these to have 0 alpha in their color. Here’s a C# example. Check the links I posted for more help.

using UnityEngine;
using System.Collections;

public class EXAMPLE : MonoBehaviour
{
    MeshRenderer[] planes;
    Color color;

    void Start()
    {
        color = Color.grey;
        color.a = 0;
        planes = GetComponentsInChildren<MeshRenderer>();
		foreach(MeshRenderer plane in planes)
        {
            plane.renderer.material.color = color;
        }
    }

    void OnMouseDown()
    {
        StartCoroutine(FadeInChildren());
    }

    IEnumerator FadeInChildren()
    {
        while(true)
        {
            color.a+= 0.01f;
            if(color.a >= 1.0f)
            {
				StopAllCoroutines();
            }
			foreach(MeshRenderer plane in planes)
	        {
	            plane.renderer.material.color = color;
	        }
			print (color.a);
            yield return new WaitForEndOfFrame();
        }
    }
}