From eb4f3a82a331ad4a06977269f1b00a094472c098 Mon Sep 17 00:00:00 2001
From: clayjohn <claynjohn@gmail.com>
Date: Thu, 22 May 2025 22:21:32 -0400
Subject: [PATCH] Ignore destination alpha when blitting to window in
 compatibility renderer

---
 drivers/gles3/rasterizer_gles3.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gles3/rasterizer_gles3.cpp b/drivers/gles3/rasterizer_gles3.cpp
index 825aa728611..d3bc531e1ba 100644
--- a/drivers/gles3/rasterizer_gles3.cpp
+++ b/drivers/gles3/rasterizer_gles3.cpp
@@ -437,6 +437,9 @@ void RasterizerGLES3::_blit_render_target_to_screen(RID p_render_target, Display
 
 	glActiveTexture(GL_TEXTURE0);
 	glBindTexture(GL_TEXTURE_2D, rt->color);
+	glEnable(GL_BLEND);
+	glBlendFunc(GL_ONE, GL_ZERO);
+
 	if (rt->view_count > 1) {
 		copy_effects->copy_to_rect_3d(screenrect, p_layer, GLES3::Texture::TYPE_LAYERED);
 	} else {