From 401e769114ac752dd9273c3d037b67c5a6512c98 Mon Sep 17 00:00:00 2001
From: paradust7 <102263465+paradust7@users.noreply.github.com>
Date: Wed, 4 May 2022 02:06:15 +0000
Subject: [PATCH] Enable GL_ALPHA_TEST in OpenGL driver for custom transparent
 alpha shaders

---
 source/Irrlicht/COpenGLSLMaterialRenderer.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/source/Irrlicht/COpenGLSLMaterialRenderer.cpp b/source/Irrlicht/COpenGLSLMaterialRenderer.cpp
index 062674f2..352c2bce 100644
--- a/source/Irrlicht/COpenGLSLMaterialRenderer.cpp
+++ b/source/Irrlicht/COpenGLSLMaterialRenderer.cpp
@@ -243,6 +243,8 @@ void COpenGLSLMaterialRenderer::OnSetMaterial(const video::SMaterial& material,
 	{
 		cacheHandler->setBlend(true);
 		cacheHandler->setBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+		cacheHandler->setAlphaTest(true);
+		cacheHandler->setAlphaFunc(GL_GREATER, 0.f);
 	}
 	else if (FixedBlending)
 	{
@@ -291,7 +293,7 @@ void COpenGLSLMaterialRenderer::OnUnsetMaterial()
 	{
 		cacheHandler->setBlend(false);
 	}
-	else if (AlphaTest)
+	if (Alpha || AlphaTest)
 	{
 		cacheHandler->setAlphaTest(false);
 	}