Unity安卓端运行时创建MeshFilter模型变粉（编辑器正常）

Hey there, let’s walk through the issues in your code and fix that annoying pink mesh problem—pink usually means Unity can’t find a valid material or mesh to render, so let’s break it down step by step:

Key Issues in Your Code #

1. Missing Mesh Assignment to MeshFilter #

You added a MeshFilter component but never created or assigned a Mesh object to it. The Unity Editor might use a fallback placeholder for unassigned meshes, but Android’s runtime doesn’t have this safety net—so it renders pink instead of your intended geometry.

2. Empty, Invalid Texture #

Creating a texture with new Texture() gives you a completely blank, uninitialized texture with no pixel data. Desktop GPUs might tolerate this lazy workaround, but Android’s GPU will reject it outright, leading to broken material rendering.

3. Redundant & Unsafe Component Calls #

You already have direct references to renderer and filter, but you’re calling GetComponent<MeshFilter>() and GetComponent<MeshRenderer>() again. This is unnecessary, wastes performance, and can cause unexpected behavior if components are modified later.

Fixed Code Example #

Here’s a revised version that addresses all these issues, using a simple quad mesh and a valid cross-platform material:

// Add components and store direct references (no redundant GetComponent calls)
MeshRenderer renderer = gameObject.AddComponent<MeshRenderer>();
MeshFilter filter = gameObject.AddComponent<MeshFilter>();

// Create a basic quad mesh (replace this with your custom vertex/triangle data if needed)
Mesh quadMesh = new Mesh();
Vector3[] vertices = new Vector3[]
{
    new Vector3(-0.5f, -0.5f, 0),
    new Vector3(0.5f, -0.5f, 0),
    new Vector3(0.5f, 0.5f, 0),
    new Vector3(-0.5f, 0.5f, 0)
};
int[] triangles = new int[] { 0, 1, 2, 0, 2, 3 };
quadMesh.vertices = vertices;
quadMesh.triangles = triangles;
quadMesh.RecalculateNormals();

// Assign the mesh to the MeshFilter (critical for rendering)
filter.mesh = quadMesh;

// Create a valid unlit white material (no empty texture required)
Material whiteMaterial = new Material(Shader.Find("Unlit/Color"));
whiteMaterial.color = Color.white;
renderer.material = whiteMaterial;

// Set scale using the existing filter reference
filter.transform.localScale = new Vector3(0.0009f, 0.0009f, 0.0009f);

Additional Android Compatibility Tips #

• Skip dynamic empty resources: Never use new Texture() or uninitialized meshes—always provide valid vertex/texture data, or use pre-made assets from your Project folder.
• Stick to built-in shaders: Shaders like Unlit/Color or Standard are guaranteed to work across platforms; custom shaders may need Android-specific adjustments for GPU compatibility.
• Verify build inclusion: Ensure any textures or materials you use are marked as included in the build (Unity might strip unused assets during Android packaging, breaking dynamic references).

内容的提问来源于stack exchange，提问作者DannyFar94