各位模组开发的大佬们，我最近遇到个棘手的问题：把自己的自定义实体渲染代码从1.16.5升级到1.20.1后，怎么都搞不定透明效果了！

我已经试过好几种方案了——比如照搬史莱姆（Slime）的渲染逻辑，调整RenderSystems.clearColor和RenderSystems.setShaderColor的参数，还检查了混合模式的设置，但实体的透明效果要么完全没反应，要么就出现奇怪的穿透/不显示的情况，完全找不到问题出在哪。

先给大家看看我在1.16.5里能正常工作的代码片段，就是这段用来渲染幽灵/消失状态实体的逻辑：

// 渲染幽灵或消失状态的实体
matrixStackIn.push();
RenderSystem.enableBlend();
RenderSystem.defaultBlendFunc();
RenderSystem.color4f(0.8F, 0.8F, 0.8F, transparency);
matrixStackIn.scale(1.3F, 1.0F, 1.3F);

this.Ear1.render(matrixStackIn, bufferIn, packedLightIn, packedOverlayIn, red, green, blue, alpha);
this.Ear2.render(matrixStackIn, bufferIn, packedLightIn, packedOverlayIn, red, green, blue, alpha);
this.Neck.render(matrixStackIn, bufferIn, packedLightIn, packedOverlayIn, red, green, blue, alpha);
this.Head.render(matrixStackIn, bufferIn, packedLightIn, packedOverlayIn, red, green, blue, alpha);

if (openMouth) {
    this.UMouth2.render(matrixStackIn, bufferIn, packedLightIn, packedOverlayIn, red, green, blue, alpha);
    this.LMouth2.render(matrixStackIn, bufferIn, packedLightIn, packedOverlayIn, red, green, blue, alpha);
} else {
    this.UMouth.render(matrixStackIn, bufferIn, packedLightIn, packedOverlayIn, red, green, blue, alpha);
    this.LMouth.render(matrixStackIn, bufferIn, packedLightIn, packedOverlayIn, red, green, blue, alpha);
}

this.Mane.render(matrixStackIn, bufferIn, packedLightIn, packedOverlayIn, red, green, blue, alpha);
this.Body.render(matrixStackIn, bufferIn, packedLightIn, packedOverlayIn, red, green, blue, alpha);
this.TailA.render(matrixStackIn, bufferIn, packedLightIn, packedOverlayIn, red, green, blue, alpha);
this.TailB.render(matrixStackIn, bufferIn, packedLightIn, packedOverlayIn, red, green, blue, alpha);
this.TailC.render(matrixStackIn, bufferIn, packedLightIn, packedOverlayIn, red, green, blue, alpha);

this.Leg1A.render(matrixStackIn, bufferIn, packedLightIn, packedOverlayIn, red, green, blue, alpha);
this.Leg1B.render(matrixStackIn, bufferIn, packedLightIn, packedOverlayIn, red, green, blue, alpha);
this.Leg1C.render(matrixStackIn, bufferIn, packedLightIn, packedOverlayIn, red, green, blue, alpha);
this.Leg2A.render(matrixStackIn, bufferIn, packedLightIn, packedOverlayIn, red, green, blue, alpha);
this.Leg2B.render(matrixStackIn, bufferIn, packedLightIn, packedOverlayIn, red, green, blue, alpha);
this.Leg2C.render(matrixStackIn, bufferIn, packedLightIn, packedOverlayIn, red, green, blue, alpha);
this.Leg3A.render(matrixStackIn, bufferIn, packedLightIn, packedOverlayIn, red, green, blue, alpha);
this.Leg3B.render(matrixStackIn, bufferIn, packedLightIn, packedOverlayIn, red, green, blue, alpha);
this.Leg3C.render(matrixStackIn, bufferIn, packedLightIn, packedOverlayIn, red, green, blue, alpha);
this.Leg4A.render(matrixStackIn, bufferIn, packedLightIn, packedOverlayIn, red, green, blue, alpha);
this.Leg4B.render(matrixStackIn, bufferIn, packedLightIn, packedOverlayIn, red, green, blue, alpha);
this.Leg4C.render(matrixStackIn, bufferIn, packedLightIn, packedOverlayIn, red, green, blue, alpha);

if (type == 39 || type == 40 || type == 28) {
    this.MidWing.render(matrixStackIn, bufferIn, packedLightIn, packedOverlayIn, red, green, blue, alpha);
    this.InnerWing.render(matrixStackIn, bufferIn, packedLightIn, packedOverlayIn, red, green, blue, alpha);
    this.OuterWing.render(matrixStackIn, bufferIn, packedLightIn, packedOverlayIn, red, green, blue, alpha);
    this.InnerWingR.render(matrixStackIn, bufferIn, packedLightIn, packedOverlayIn, red, green, blue, alpha);
    this.MidWingR.render(matrixStackIn, bufferIn, packedLightIn, packedOverlayIn, red, green, blue, alpha);
    this.OuterWingR.render(matrixStackIn, bufferIn, packedLightIn, packedOverlayIn, red, green, blue, alpha);
}

if (type >= 50 && type < 60) {
    this.ButterflyL.render(matrixStackIn, bufferIn, packedLightIn, packedOverlayIn, red, green, blue, alpha);
    this.ButterflyR.render(matrixStackIn, bufferIn, packedLightIn, packedOverlayIn, red, green, blue, alpha);
}

if (saddled) {
    this.HeadSaddle.render(matrixStackIn, bufferIn, packedLightIn, packedOverlayIn, red, green, blue, alpha);
    this.Saddle.render(matrixStackIn, bufferIn, packedLightIn, packedOverlayIn, red, green, blue, alpha);
    this.SaddleB.render(matrixStackIn, bufferIn, packedLightIn, packedOverlayIn, red, green, blue, alpha);
    this.SaddleC.render(matrixStackIn, bufferIn, packedLightIn, packedOverlayIn, red, green, blue, alpha);
    this.SaddleL.render(matrixStackIn, bufferIn, packedLightIn, packedOverlayIn, red, green, blue, alpha);
    this.SaddleL2.render(matrixStackIn, bufferIn, packedLightIn, packedOverlayIn, red, green, blue, alpha);
    this.SaddleR.render(matrixStackIn, bufferIn, packedLightIn, packedOverlayIn, red, green, blue, alpha);
    this.SaddleR2.render(matrixStackIn, bufferIn, packedLightIn, packedOverlayIn, red, green, blue, alpha);
    this.SaddleMouthL.render(matrixStackIn, bufferIn, packedLightIn, packedOverlayIn, red, green, blue, alpha);
    this.SaddleMouthR.render(matrixStackIn, bufferIn, packedLightIn, packedOverlayIn, red, green, blue, alpha);
}

matrixStackIn.pop();

在1.16.5里这段代码能完美实现幽灵状的半透明效果，但到了1.20.1，我把RenderSystem.color4f换成RenderSystems.setShaderColor，调整了混合模式的开启方式，却怎么都达不到预期效果。有没有大佬能指点一下，1.20.1的渲染管线在透明处理上有哪些关键的变化？或者我是不是漏掉了什么必须的设置（比如深度写入、Shader参数之类的）？

万分感谢各位的帮忙！

内容来源于stack exchange