From 1528c2cf3b01b9ae2aad7c1398886198b21bf8ff Mon Sep 17 00:00:00 2001
From: RF47 <162915171+RF47@users.noreply.github.com>
Date: Fri, 13 Mar 2026 22:42:40 -0300
Subject: [PATCH] Skip top surfaces with non-positive density

Add a guard that skips creating fill params for top surfaces when the configured density is less than or equal to zero. This avoids generating surface fills for zero/negative densities and prevents unnecessary processing or potential errors when top surface density is disabled.
---
 src/libslic3r/Fill/Fill.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/libslic3r/Fill/Fill.cpp b/src/libslic3r/Fill/Fill.cpp
index 500eb944ac..9d9962dbc8 100644
--- a/src/libslic3r/Fill/Fill.cpp
+++ b/src/libslic3r/Fill/Fill.cpp
@@ -882,6 +882,7 @@ std::vector<SurfaceFill> group_fills(const Layer &layer, LockRegionParam &lock_p
                         if (surface.is_top()) {
                             params.pattern = region_config.top_surface_pattern.value;
                             params.density = float(region_config.top_surface_density);
+                            if (params.density <= 0.0f) continue;
                         } else { // Surface is bottom
                             params.pattern = region_config.bottom_surface_pattern.value;
                             params.density = float(region_config.bottom_surface_density);