顶点皮肤在使用Monodroid的真实Android设备上看起来很乱

Question

我做＆＃34;顶点蒙皮＆＃34;没问题。用于三维动画。使用模拟器（和genymotion）时，所有内容都正常。但是，在真实设备（例如三星和联想）上运行时，看起来凌乱。

Screenshoot（模拟器）

http://1drv.ms/1BzZ9Ib

Screenshoot（真实设备）

1drv.ms/1BzZ2we

传递皮肤变换矩阵

int location = ...;
int arrayCount = ...;
float[] skinTransform = ...;
GL.UniformMatrix4(location, arrayCount, false, skinTransform);

GLSL顶点

uniform mat4 World;
uniform mat4 View;
uniform mat4 Projection;
uniform mat4 Bones[20];

attribute vec4 Position;
attribute vec4 BoneIndices;
attribute vec4 BoneWeights;
attribute vec2 UV;
varying vec4 v_Position;
varying vec2 v_UV;

void main()
{
    mat4 skinTransform;
    int boneIndex = int(BoneIndices.x);
    skinTransform += Bones[boneIndex] * BoneWeights.x;
    boneIndex = int(BoneIndices.y);
    skinTransform += Bones[boneIndex] * BoneWeights.y;
    boneIndex = int(BoneIndices.z);
    skinTransform += Bones[boneIndex] * BoneWeights.z;
    boneIndex = int(BoneIndices.w);
    skinTransform += Bones[boneIndex] * BoneWeights.w;
    vec4 skinPos = Position * skinTransform;
    vec4 worldPosition = skinPos * World;
    vec4 viewPosition = worldPosition * View;
    v_Position = viewPosition * Projection;
    v_UV = UV;
    gl_Position = v_Position;
}

APK

http://1drv.ms/1BzYV3Q 触摸屏幕至开/关动画。

信息

1. Xamarin.Android = 4.10.x.x
2. 仿真器目标= API 16或4.1
3. Real device Target = API 16或4.1
4. App Target = API 10或2.3（也在API 14和API 16中测试），结果保持不变

有没有解决这个问题的方案？

致以最诚挚的问候，谢谢。