From e57e6a5cbee1543e43917ff5debde8d7732ce03d Mon Sep 17 00:00:00 2001
From: ostermine <enemrulit@gmail.com>
Date: Sun, 11 Oct 2026 21:36:34 +0300
Subject: [PATCH] fix modelviewer background is not transparent

---
 src/graphics/ui/elements/ModelViewer.cpp | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/graphics/ui/elements/ModelViewer.cpp b/src/graphics/ui/elements/ModelViewer.cpp
index 435f3340d..043475d13 100644
--- a/src/graphics/ui/elements/ModelViewer.cpp
+++ b/src/graphics/ui/elements/ModelViewer.cpp
@@ -120,7 +120,7 @@ void ModelViewer::draw(const DrawContext& pctx, const Assets& assets) {
         if (size.x <= 0 || size.y <= 0) {
             return;
         }
-        fbo = std::make_unique<Framebuffer>(size.x, size.y);
+        fbo = std::make_unique<Framebuffer>(size.x, size.y, true);
     }
     fbo->resize(size.x, size.y);
     {
@@ -130,7 +130,14 @@ void ModelViewer::draw(const DrawContext& pctx, const Assets& assets) {
         ctx.setViewport({size.x, size.y});
         ctx.setDepthTest(true);
         ctx.setCullFace(true);
+        // transparent background, the screen clear color is restored below
+        GLfloat clearColor[4];
+        glGetFloatv(GL_COLOR_CLEAR_VALUE, clearColor);
+        glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
         display::clear();
+        glClearColor(
+            clearColor[0], clearColor[1], clearColor[2], clearColor[3]
+        );
         
         auto& ui3dShader = assets.require<Shader>("ui3d");
         ui3dShader.use();