CombineMesh the UV has problem.

The man's rightLeg is black, is there anyone know the problem?



there are my core code bellow:


for (int i = 0; i < targetParts.Length; i++)
{
SkinnedMeshRenderer pointSMR = targetParts.GetComponent<SkinnedMeshRenderer>();
List_Matrials.Add(pointSMR.material);
for (int sub = 0; sub < pointSMR.sharedMesh.subMeshCount; sub++)
{
CombineInstance ci = new CombineInstance();
ci.mesh = pointSMR.sharedMesh;
ci.subMeshIndex = sub;
combineInstances.Add(ci);
}

uvList.Add(pointSMR.sharedMesh.uv);
uvCount += pointSMR.sharedMesh.uv.Length;

Renderer tempRD = pointSMR.GetComponent<Renderer>();

if (tempRD.material.mainTexture != null)
{
textures.Add(tempRD.material.mainTexture as Texture2D);
width += tempRD.material.mainTexture.width;
height += tempRD.material.mainTexture.height;
}

for (int bi = 0; bi < pointSMR.bones.Length; bi++)
{
for (int ti = 0; ti < transforms.Length; ti++)
{
if (transforms[ti].name != pointSMR.bones[bi].name) continue;
boneList.Add(transforms[ti]);
break;
}
}
}

SkinnedMeshRenderer tempRenderer = root.gameObject.GetComponent<SkinnedMeshRenderer>();
if (!tempRenderer)
{
tempRenderer = root.gameObject.AddComponent<SkinnedMeshRenderer>();
}
tempRenderer.sharedMesh = new Mesh();

tempRenderer.sharedMesh.CombineMeshes(combineInstances.ToArray(), true, false);
tempRenderer.bones = boneList.ToArray();

Material newMaterial = new Material(List_Matrials[0].shader);
newMaterial.CopyPropertiesFromMaterial(List_Matrials[0]);
tempRenderer.material = newMaterial;

Texture2D skinnedMeshAtlas = new Texture2D(1, 1);
Rect[] packingResult = skinnedMeshAtlas.PackTextures(textures.ToArray(), 0)

Vector2[] atlasUVs = new Vector2[uvCount];

int UvIndex = 0;
for (int i = 0; i < uvList.Count; i++)
{
for (int j = 0; j < uvList.Length; j++)
{
atlasUVs[UvIndex].x = packingResult.x + uvList[j].x * packingResult.width;
atlasUVs[UvIndex].y = packingResult.y + uvList[j].y * packingResult.height;

UvIndex++;
}
}

tempRenderer.material.mainTexture = skinnedMeshAtlas;
tempRenderer.sharedMesh.uv = atlasUVs;

 

You didn't quite use the correct code tags, but I do appreciate the effort.. A+

Check this post: https://forum.unity.com/threads/using-code-tags-properly.143875/

Also, it looks like a lighting normal problem. Did you call .RecalculateNormals() on the mesh?

https://docs.unity3d.com/ScriptReference/Mesh.RecalculateNormals.html

 

Thanks , i found it's the UV's problem. The modle's rightLeg UV are negative