BlindsFeeder labels not rendering in OpenSCAD (F6) – fix

[Koichi Kurahashi]

Hi,

I ran into an issue with BlindsFeeder-3DPrinting in OpenSCAD where labels do not appear in a full render (F6), even when label=true. They do appear in preview (F5).

I asked someone more familiar with OpenSCAD, and they suggested that this may be caused by 2D geometry (text/label shapes) being used in a 3D context without extrusion, which newer OpenSCAD versions handle more strictly.

Based on that suggestion, I applied the following change:

```diff
 color("black") if (label || $preview) {
     pt_scale=25.4/72.0;
     font_scale=16/21;
-    // Create outline and header of label.
-    if (first && lane_i == 0) {
+    translate([0, 0, floor_thickness-e]) linear_extrude(height=layer_height+e) {
+        // Create outline and header of label.
+        if (first && lane_i == 0) {
             ...
-    }
-    for (part_line = [0:len(part)]) {
+        }
+        for (part_line = [0:len(part)]) {
             ...
-    }
+    }
     echo (...);
 }

After this change, labels render correctly and are included in the STL.

Tested with:

• OpenSCAD version 2026.04.26 (git b38f6888)

Hope this helps.

P.S. I'm not very familiar with OpenSCAD internals, so I probably won’t be much help with deeper questions — just sharing what worked for me.

[Harjit Singh]

Perhaps send a pull request?

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