AI虚拟数字人可以用多种软件创建和生成，包括Unity、Unreal Engine、Maya、Blender等。其中，Unity和Unreal Engine是游戏和虚拟现实的主要引擎，Maya和Blender则更适用于角色建模和动画制作。

Unity的Avatar SDK是一种非常流行的数字人生成软件，它可以帮助开发人员将2D或3D人物动画转换为数字人，并在虚拟应用程序中使用。以下是一个使用Avatar SDK创建数字人的简单示例：

using UnityEngine;
using UnityEngine.Assertions;
using UnityEngine.UI;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;

using Oculus.Avatar;
using Oculus.Platform;

public class MyAvatar : MonoBehaviour {

    private const string AssetFile = "MyCustomAvatar";
    private const string TextureFile = "AvatarTexture";

    private static readonly string[] TexturePaths = {
        "Assets/Textures/AvatarTexture.jpg",
        "Assets/Textures/AvatarTexture.png"
    };

    private void Start () {
        StartCoroutine(LoadAsset());
    }

    private IEnumerator LoadAsset () {
        yield return new WaitForEndOfFrame();

        var loaded = false;
        foreach (var path in TexturePaths) {
            if (File.Exists(path)) {
                var rawTexture = new Texture2D(2, 2);
                rawTexture.LoadImage(File.ReadAllBytes(path));
                OculusAvatar.SetTexture(TextureFile, rawTexture);
                loaded = true;
                break;
            }
        }

        if (!loaded) {
            UnityEngine.Debug.LogWarning("Failed to load texture.");
        }

        var assetBundle = AssetBundle.LoadFromFile(Path.Combine(Application.streamingAssetsPath, AssetFile));
        var asset = assetBundle.LoadAsset(AssetFile);
        var localAvatar = Instantiate(asset);

        OculusAvatar.LocalAvatar = localAvatar;
        OculusAvatar.UpdatePose(0);
    }

}

Unreal Engine也拥有强大的虚拟数字人建模和动画工具，例如Persona、Animation Editor、Blueprints等。以下示例展示了如何使用Persona创建数字人：

void USampleCharcter::CreateCharacter() {
    // Load character mesh
    const FString CharacterPath = "/Game/Characters/SampleCharacter";
    static ConstructorHelpers::FObjectFinder CharacterMesh(TEXT("/Game/Characters/SampleCharacter/SampleCharacterMesh.SampleCharacterMesh"));
    if (CharacterMesh.Succeeded()) {
        GetMesh()->SetSkeletalMesh(CharacterMesh.Object);
    }

    // Setup Anim blueprint
    static ConstructorHelpers::FClassFinder AnimBPClass(TEXT("/Game/