From 6779cb7254cf6d08652a49ac1e5be23cd5131f8a Mon Sep 17 00:00:00 2001
From: sfan5 <sfan5@live.de>
Date: Fri, 19 Nov 2021 19:27:47 +0100
Subject: [PATCH] Unconditionally load first texture matrix in OpenGL driver

This used to work in Irrlicht 1.8 and I tried to figure out
why it no longer did, but failed.
fixes minetest/minetest#11206
---
 source/Irrlicht/COpenGLDriver.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/source/Irrlicht/COpenGLDriver.cpp b/source/Irrlicht/COpenGLDriver.cpp
index 454f0e30..5315232d 100644
--- a/source/Irrlicht/COpenGLDriver.cpp
+++ b/source/Irrlicht/COpenGLDriver.cpp
@@ -2730,7 +2730,8 @@ void COpenGLDriver::setTextureRenderStates(const SMaterial& material, bool reset
 		{
 			CacheHandler->setActiveTexture(GL_TEXTURE0 + i);
 
-			if (fixedPipeline)
+			// Minetest uses the first texture matrix even with the programmable pipeline
+			if (fixedPipeline || i == 0)
 			{
 				const bool isRTT = tmpTexture->isRenderTarget();