What is CUR?

Windows Cursor (CUR) is the mouse cursor format for Windows, supporting static and animated pointers with hotspot definitions.

What is MOS?

Mamiya MOS (Leaf MOS) is a raw sensor data format from Mamiya/Leaf digital camera backs, used in professional studio photography.

When Should You Use CUR vs MOS?

CUR vs MOS: Key Differences

• •CUR uses lossless compression while MOS uses lossless compression — both take the same approach to file size management.
• •Since both CUR and MOS use lossless compression, the quality characteristics are comparable — differences in file size come down to how efficiently each format implements compression.
• •Alpha channel support: MOS lacks transparency support.
• •File sizes: CUR files typically range Very small, typically under 50KB and MOS files 30-70MB per image.
• •Primary audience: CUR is built for windows ui cursors, mouse pointer graphics scenarios, while MOS focuses on mamiya camera raw processing — pick the format that matches your output requirement.

Advantages of CUR

• ✓CUR uses lossless compression tailored for Windows UI cursors, mouse pointer graphics.
• ✓CUR is supported natively on virtually every device, browser, and operating system.
• ✓CUR files are bit-for-bit perfect, preserving every pixel and sample for professional work.
• ✓CUR integrates seamlessly with all major creative tools and workflows.

Advantages of MOS

• ✓MOS compresses data using lossless methods, keeping file sizes manageable for Mamiya camera raw processing.
• ✓Industry-wide support means MOS files open anywhere — from legacy systems to the latest devices.
• ✓Lossless quality makes MOS the gold standard for archival and master copies.
• ✓From professional software to open-source alternatives, MOS works out of the box.

Common Use Cases for CUR to MOS Conversion

• Brochure and flyer design
• Newsletter graphics
• Video thumbnail creation
• Certificate and badge design
• Websites and online content
• Print materials and publications

Industry Applications

Best Practices for CUR to MOS Conversion

• →Before converting CUR to MOS, decide whether you need maximum quality or smallest file size — this determines which format truly fits
• →Save a master copy in a lossless format before converting to MOS — you cannot recover detail lost during lossy compression
• →Check the color profile: CUR images may use a wider gamut than MOS supports, causing a visible shift after conversion
• →Resize images to the final display dimensions before converting — this avoids unnecessary processing of oversized files
• →Run a single test conversion first to verify quality meets your standards
• →Strip unnecessary metadata to reduce file size after conversion

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Troubleshooting CUR to MOS Conversion

• !Converting CUR to MOS gives blurry output → increase the quality setting before conversion
• !Colors look different in MOS than CUR → check color profile mismatch (sRGB vs Adobe RGB)
• !File size changed more than expected → MOS uses different compression, file size differences of 2-5x are normal
• !Transparent areas in CUR turned white in MOS → MOS may not support transparency

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