From d5ad1ca1aef52f08791fbc48e47897e8a5204539 Mon Sep 17 00:00:00 2001
From: Juan Linietsky <reduzio@gmail.com>
Date: Mon, 19 Nov 2018 21:41:18 -0300
Subject: Fix crash on canvas with BG_MODE_KEEP, closes #19590

---
 drivers/gles3/rasterizer_scene_gles3.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gles3/rasterizer_scene_gles3.cpp b/drivers/gles3/rasterizer_scene_gles3.cpp
index 0951b8f798..b3c2332485 100644
--- a/drivers/gles3/rasterizer_scene_gles3.cpp
+++ b/drivers/gles3/rasterizer_scene_gles3.cpp
@@ -4297,8 +4297,10 @@ void RasterizerSceneGLES3::render_scene(const Transform &p_cam_transform, const
 		glClearBufferfv(GL_COLOR, 0, clear_color.components); // specular
 	}
 
+	VS::EnvironmentBG bg_mode = (!env || (probe && env->bg_mode == VS::ENV_BG_CANVAS)) ? VS::ENV_BG_CLEAR_COLOR : env->bg_mode;
+
 	if (env) {
-		switch (env->bg_mode) {
+		switch (bg_mode) {
 			case VS::ENV_BG_COLOR_SKY:
 			case VS::ENV_BG_SKY:
 
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