转载：https://blog.csdn.net/Wenhao_China/article/details/122009744
1、创建一个Shader

Shader "Custom/3D Text Shader" {
    Properties{
        _MainTex("Font Texture", 2D) = "white" {}
        _Color("Text Color", Color) = (1,1,1,1)
    } 
        SubShader{
            Tags{ "Queue" = "Transparent" "IgnoreProjector" = "True" "RenderType" = "Transparent" }
            Lighting Off Cull Off ZWrite On Fog { Mode Off }
            Blend SrcAlpha OneMinusSrcAlpha
            Pass {
                Color[_Color]
                SetTexture[_MainTex] {
                    combine primary, texture * primary
                }
            }
        }
}

2、创建一个Material
然后Shader改为刚刚创建的这个Shader
3、给Material赋值字体
把你想要用的字体拖拽到Unity中来，然后字体下边的Font Texture，赋值给当前的Material。
4、给3DText属性赋值
3DText 的字体设置为刚才的字体，material设置为刚才创建的