throw error when user tries to use Canvas background without sample buffer

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/gles3/rasterizer_scene_gles3.cpp b/drivers/gles3/rasterizer_scene_gles3.cpp
index 1472954ebc..b582ac6369 100644
--- a/drivers/gles3/rasterizer_scene_gles3.cpp
+++ b/drivers/gles3/rasterizer_scene_gles3.cpp
@@ -4335,6 +4335,10 @@ void RasterizerSceneGLES3::render_scene(const Transform &p_cam_transform, const
 			if (storage->frame.current_rt->buffers.active) {
 				current_fbo = storage->frame.current_rt->buffers.fbo;
 			} else {
+				if (storage->frame.current_rt->effects.mip_maps[0].sizes.size() == 0) {
+					ERR_PRINT_ONCE("Can't use canvas background mode in a render target configured without sampling");
+					return;
+				}
 				current_fbo = storage->frame.current_rt->effects.mip_maps[0].sizes[0].fbo;
 			}