diff --git a/src/libslic3r/PrintObjectSlice.cpp b/src/libslic3r/PrintObjectSlice.cpp
index d4d2941e3..6ec459d56 100644
--- a/src/libslic3r/PrintObjectSlice.cpp
+++ b/src/libslic3r/PrintObjectSlice.cpp
@@ -273,11 +273,15 @@ static std::vector<std::vector<ExPolygons>> slices_to_regions(
                     float z                          = zs[z_idx];
                     int   idx_first_printable_region = -1;
                     bool  complex                    = false;
+                    std::vector<int> printable_region_ids;
                     for (int idx_region = 0; idx_region < int(layer_range.volume_regions.size()); ++ idx_region) {
                         const PrintObjectRegions::VolumeRegion &region = layer_range.volume_regions[idx_region];
                         if (region.bbox->min().z() <= z && region.bbox->max().z() >= z) {
-                            if (idx_first_printable_region == -1 && region.model_volume->is_model_part())
+                            if (region.model_volume->is_model_part())
+                                printable_region_ids.push_back(idx_region);
+                            if (idx_first_printable_region == -1 && region.model_volume->is_model_part()) {
                                 idx_first_printable_region = idx_region;
+                            }
                             else if (idx_first_printable_region != -1) {
                                 // Test for overlap with some other region.
                                 for (int idx_region2 = idx_first_printable_region; idx_region2 < idx_region; ++ idx_region2) {
@@ -293,8 +297,10 @@ static std::vector<std::vector<ExPolygons>> slices_to_regions(
                     if (complex)
                         zs_complex.push_back({ z_idx, z });
                     else if (idx_first_printable_region >= 0) {
-                        const PrintObjectRegions::VolumeRegion &region = layer_range.volume_regions[idx_first_printable_region];
-                        slices_by_region[region.region->print_object_region_id()][z_idx] = std::move(volume_slices_find_by_id(volume_slices, region.model_volume->id()).slices[z_idx]);
+                        for (int printable_region_id : printable_region_ids) {
+                            const PrintObjectRegions::VolumeRegion &region = layer_range.volume_regions[printable_region_id];
+                            append(slices_by_region[region.region->print_object_region_id()][z_idx], std::move(volume_slices_find_by_id(volume_slices, region.model_volume->id()).slices[z_idx]));
+                        }
                     }
                 }
             }