Black texture on a plan

Unity Engine
,
1

Hi all guys!
I’ve a problem: I put a mesh (a plan) made with only two triangles, in front of my main camera. This mesh has a texture and this texture becomes totally black if I build my scene for android.
If I apply the same texture on a cube it works.

I tried all I read on this forum:

  • Resized the texture
  • Changed the material to “mobile”
  • Tried every type of textures compression

But nothing.

Here’s the code that generate my mesh:

using UnityEngine;
using System.Collections;

/// <summary>
/// Represents a quad, a square composed by two primitives.
/// </summary>
[RequireComponent(typeof(MeshFilter), typeof(MeshRenderer))]
public class Quad : MonoBehaviour {
    // Uses always the same vertices. The transform component automatically shifts the quad
    // to its proper location in 3D space.
    private static readonly Vector3[] vertices = {
        new Vector3(-0.5f, 0.5f, 1), new Vector3(0.5f, 0.5f, 0), new Vector3(0.5f, -0.5f, 0), new Vector3(-0.5f, -0.5f, 0)
    };

    // The indices are always the same.
    private static readonly int[] indices = {
        0, 1, 2, 2, 3, 0
    };

    // Contains the UV coordinates of each quad vertex. The array is indexed by Corner enum, properly cast to int.
    private Vector2[] uvCoordinates;

    // Reference to the mesh component.
    private Mesh mesh;
	
    /// <summary>
    /// The material to use when drawing this quad. Mainly exploited for its texture.
    /// </summary>
	public Material material;

	public Vector2 upperLeftUv, upperRightUv, lowerRightUv, lowerLeftUv;

    /// <summary>
    /// Gets or sets the UV coordinate of the given corner.
    /// </summary>
    public Vector2 this[Corner corner] {
        get {
            return uvCoordinates[(int)corner];
        }
        set {
            uvCoordinates[(int)corner] = value;
        }
    }

    /// <summary>
    /// Initializes the quad.
    /// </summary>
    public Quad() {
		this.upperLeftUv = new Vector2(0, 1);
		this.upperRightUv = new Vector2(1, 1);
		this.lowerRightUv = new Vector2(1, 0);
		this.lowerLeftUv = new Vector2(0, 0);
    }

    // Creates a new mesh and assigns vertices and triangles.
	void Awake() {
		this.uvCoordinates = new Vector2[] { upperLeftUv, upperRightUv, lowerRightUv, lowerLeftUv };
		
        this.mesh = new Mesh();
        this.mesh.vertices = vertices;
        this.mesh.triangles = indices;
        this.mesh.uv = this.uvCoordinates;
	}

    // Assign the new mesh to the mesh drawer property and the given material to its renderer.
    void Start() {
        this.GetComponent<MeshFilter>().mesh = mesh;
        this.GetComponent<MeshRenderer>().material = material;
    }
}
2

Some materials require normals and tangents to display properly.

for normals:
this.mesh.RecalculateNormals();

Unity doesn’t have a RecalculateTangents() so you might have to use the solution here:

If you build to Android with the Quad and a Unity Cube side by side does the Cube work in Android?

3

Yes the cube Work.
The solution using mesh.RecalculateNormals() rotate the two triangles of the mesh. I’ll try withhttp://answers.unity3d.com/questions/7789/calculating-tangents-vector4.html

Thank you!