From Youtuber TD Vision U:" This LiDAR Scanner Doesn't Need Your Phone - And It Changes Everything".

Key Technical Specifications and Comparisons

Physical and Usability Improvements

• Form factor: The P4 retains the familiar size and weight of the M2, making it comfortable and recognizable to existing users.
• Color: Shifts from cool gray (M2) to all black.
• Lidar Sensor Housing: Slightly larger in P4, with an extra aperture contributing to a much higher point capture rate.
• Tripod Mount: Introduces a quick-release feature improving repositioning efficiency across long scanning sessions.
• Battery: Transitioned from one large, long-lasting battery (M2) to 2 smaller batteries enabling hot swapping for continuous workday use.
• Storage and Kit Organization: Comes with hard cases for both device and tripod, fitting conveniently into a branded backpack—ideal for professionals needing portability and organization.
• Touchscreen Display: A newly added touchscreen significantly changes the on-site workflow by allowing standalone operation without the need for an auxiliary device.
  
  

Performance and Field Testing Highlights

• Range and Accuracy:
  • The P4 demonstrated a usable point cloud radius of 51 m (170 ft)** from a single scan station, far exceeding the M2’s 25 m range.
  • Accuracy improved from a ±20 mm margin (M2) to ±10 mm, reducing design discrepancies and enhancing as-built documentation accuracy for BIM workflows.
• Point Density:
  • The P4’s output of 125,600 points per second is nearly seven times greater than the M2’s 18,600, permitting richer and denser data, especially when multiple scan stations overlap.
    
    
• Image Quality:
  • The P4 delivers sharper, richer panoramas at 24K clarity with a 47 MP sensor, compared to the M2’s 16K and 134 MP photos.
  • Enhanced HDR capability manages difficult lighting (e.g., sharp contrasts between bright sun and shade) better than typical cameras.
  • The addition of multi-spectral sensors provides greater detail retention and color accuracy.
    
    
• High-Fidelity Mode:
  • Offers crisper geometry and images but increases individual scan time from 16 seconds (standard) to approximately 70 seconds.
  • Recommended for high-quality deliverables like renovation documentation or condition reports.
    
    
• Narrow Space Handling:
  • A fisheye lens with a 213.25° vertical field of view efficiently captures narrow, tall spaces (a 3 ft 9 in closet with an 8 ft high window) with minimal distortion, outperforming the M2’s narrower vertical view.
    
    

Groundbreaking Feature: Standalone, Blind Scan Capture

• The P4 enables fully standalone scanning without a phone or tablet connected, a rare capability at this price point.
• Operation:
  • Press and hold the touchscreen for 5 seconds to initiate a 16-second scan.
  • The device automatically saves data to the onboard SSD.
  • User moves between scan stations blindly, repeating the process without requiring live preview or device pairing.
• Field Test:
  • Conducted a full multi-room scan of an 18-scan station four-bedroom home without any live feedback or phone connection.
  • Importing scans into the Realsee app afterward yielded 17 stations automatically aligned; one required manual adjustment.
  • Demonstrated seamless integration of blind scans with phone-assisted scanning in the same project, allowing ongoing work flexibility.
    
    

Software and Ecosystem Features

• Realsee platform offers a pay-as-you-go business model with no mandatory monthly subscription, ideal for intermittent users.
• Automated cloud processing includes:
  • High-resolution stitching
  • Point cloud alignment
  • Deliverable generation: virtual 3D tours, E57/PLY point cloud files for BIM use, OBJ/FBX for visualization, panoramas, and automatically generated CAD floor plans.
• The auto-generated CAD floor plans are approximately 90% ready for immediate use, significantly simplifying design workflows compared to manual vectorizing.
• The system supports continued project work across multiple days or operators, enhancing scalability for commercial jobs.
  
  

Practical Recommendations and Use Cases

• Realsee M2 remains ideal for:
  • Residential and light commercial projects
  • Users prioritizing affordability ($5,500 standard kit, with exclusive offers lowering it to $5,000)
  • Scans within a 25 m range
    
    
• Realsee P4 targets professional users whose project scope demands:
  • Extended scanning range (up to 100 m)
  • Higher accuracy (±10 mm)
  • Much denser point clouds for complex multi-room or infrastructure projects
  • Mobility and battery flexibility for full-day site work
  • Standalone scanning workflow without dependency on external devices
    
    
• Users scanning large commercial, infrastructure, or complex multi-residential properties will benefit most from the P4’s capabilities.

Key Insights and Conclusions

• The Realsee Galois P4 is a game-changing lidar scanner in the $7,499 price segment, delivering top-tier range, accuracy, and point density.
• The touchscreen-enabled standalone “blind scanning” mode represents a major workflow advancement, reducing reliance on phones or tablets and handling full-site captures efficiently.
• The combination of improved hardware, software ecosystem, and flexible pricing creates a compelling option for professionals needing scalable, versatile scanning solutions.
• Compared to high-end competitors like the Leica BLK360 G2, the P4 offers similar standalone capabilities at less than a quarter of the price.
• For lighter residential and commercial work, the M2 remains cost-effective with excellent features.
• The reviewer's practical field test validates the P4’s claims, showcasing the robust application in challenging environments, including narrow interiors and demanding lighting.
  
  
  

Additional Notes

• Full demonstrations and workflow details for importing Realsee scans into CAD and BIM software are available in a separate linked tutorial.
• Realsee’s partnership with Clayton Homes enabled practical testing inside a manufactured home, highlighting the P4’s ability to manage tight and detailed spaces.
• The reviewer strongly recommends new users develop an intentional scan path when using the blind mode due to the lack of real-time preview; however, it is not technically difficult with experience.