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-# October 2025 Challenge: "Is it Glass or Clearly Natural?"
-
-### Challenge Overview
-
-Experience the clarity of 3D Fuel's "Clearly Natural" filament in this transparency-focused challenge! Participants will attempt to create the clearest possible print, testing the limits of clear filament printing techniques.
-
-### Challenge Rules
-
-#### Materials & Constraints
-
-- **Filament**: 3D Fuel "Clearly Natural" - Available in two variations:
-  - PCTG (Polyethylene Terephthalate Glycol)
-  - PLA (Polylactic Acid)
-- **Maximum Filament Usage**: 250g per entry
-- **Model Specification**: Cylinder - 25mm diameter x 50mm height
-- **Print Mode**: Vase mode (approximately 6 grams of filament)
-
-#### Competition Categories
-
-- **PCTG Division**: For prints using Clearly Natural PCTG
-- **PLA Division**: For prints using Clearly Natural PLA
-- **Overall Winner**: Best clarity across both divisions
-
-#### Judging Criteria
-
-1. **Clarity & Transparency** (40%): How clear and glass-like is the final print?
-2. **Print Quality** (30%): Surface finish, layer adhesion, and overall structural integrity
-3. **Technique Innovation** (20%): Creative printing techniques to maximize transparency
-4. **Challenge Adherence** (10%): Following material constraints and using supplied model
-
-#### Submission Requirements
-
-- **Model Compliance**: Cylinder must measure 25mm diameter x 50mm height
-- **Vase Mode**: Must be printed in vase mode (single perimeter wall)
-- **Weight Verification**: Should use approximately 6 grams of filament
-- **Documentation**: Include photos showing transparency (with light sources)
-- **Settings Documentation**: Share printer settings used (layer height, temperature, speed, etc.)
-- **Process Notes**: Brief description of techniques used to achieve clarity
-
-#### Evaluation Process
-
-- **Transparency Test**: Prints will be evaluated under controlled lighting conditions
-- **Comparative Assessment**: Side-by-side comparison with actual glass reference
-- **Community Voting**: People's choice award for favorite clear print
-- **Technical Review**: Expert panel assessment of print quality and technique
-
-### Prizes & Recognition
-
-#### Awards
-
-- **PCTG Division Winner**: Recognition + prize
-- **PLA Division Winner**: Recognition + prize  
-- **Overall "Glass Master" Winner**: Grand prize + recognition
-- **People's Choice Award**: Community favorite
-- **Innovation Award**: Most creative clarity technique
-
-#### Documentation
-
-- Winner photos for social media sharing
-- Video documentation of winning techniques
-- Settings and process sharing for community learning
-
-### Timeline
-
-- **Challenge Announcement**: October 1, 2025
-- **Model Specification Released**: October 13, 2025
-- **Submission Deadline**: October 28, 2025
-- **Judging Period**: October 29-30, 2025
-- **Winner Announcement**: October 31, 2025
-
-### Creating the Cylinder Model
-
-#### Using Bambu Studio
-
-**Step 1: Add Primitive**
-
-1. Open Bambu Studio to a new project
-2. Right-click on the build plate
-3. Select "Add Primitive"
-4. Select "Cylinder"
-
-![Adding Cylinder Primitive](../../.images/Oct-Comp-ss1.png)
-
-**Step 2: Resize the Cylinder**
-
-1. Click to resize the cylinder
-2. Uncheck "uniform scale" if checked
-3. Set X and Y to 25mm
-4. Set Z to 50mm
-
-![Resizing Cylinder Dimensions](../../.images/Oct-Comp-ss2.png)
-
-#### Alternative Methods
-
-- **Fusion 360**: Create cylinder sketch, extrude to 50mm height
-- **Tinkercad**: Use cylinder shape, adjust dimensions
-- **FreeCAD**: Create cylinder with specified dimensions
-- **Any CAD Software**: Simple cylinder 25mm diameter x 50mm height