# 3DF 27.55

## Library Compatibility Information

Library Name | Version | Windows | Linux | OS X | Notes
--- | --- | --- | --- | --- | ---
DGN Direct | 4.2 |  |  |  |
HOOPS Communicator | 2022 SP1 |  |  |  |
HOOPS Exchange | 2024.4.0 |  |  |  |
HOOPS Publish | 2024.4.0 |  |  |  | Requires support for SSSE3 instruction set.
.NET Framework | 4.0 |  |  |  | v4.5 required for wpf_image and for WPF over Remote Desktop
Parasolid | 32.0.x |  |  |  |
Qt | 5.12.7 |  |  |  | Visualize is compatible with Qt 5.4 on OSX
RealDWG | 2019 |  |  |  | RealDWG 2019 is compatible with Visual Studio 2015 Update 3 and Visual Studio 2017 Update 2
SketchUp | 2021 |  |  |  | 64-bit Windows only. Requires Visual Studio 2019 Redistributable.

## Enhancements

## Functional Changes

- libtiff upgrade. Upgraded libtiff to v4.6.0t to address critical vulnerabilities and exposures.
- fribidi upgrade. Upgraded Fribidi to v1.0.15 to address critical vulnerabilities and exposures.

## Fixed Bugs

As of Apr 29, 2026

Issue | Description
--- | ---
SDHV-20797 | HOOPS Version 27.22: Crash while HC_Delete_Segment
SDHV-20768 | HC_Show_Bounding_Info crashes when using double precision api such as HC_DInsert_Polyline
SDHV-20721 | TK_Disable_Custom_Shader Blocks Saving Content to HSF [240628-000011]
SDHV-20720 | Uncaught Access Violation Exception in hps_core.dll[240627-000021]
SDHV-20678 | Eye dome lighting in HoopsPartViewer
SDHV-20626 | ProgressCallback value error when reading large HSF file
SDHV-20615 | How to Use FramerateFixed Mode
SDHV-20587 | Regression: HOOPS V29 is slower than V25 using 3DPV default settings for specific model
SDHV-20558 | Regression: HOOPS V29 is slower than V25 using 3DPV custom settings for specific model
SDHV-20477 | Address latest security vulnerabilities
SDHV-20446 | Videoeffects do not work or work incorrectly on double precision rendering
SDHV-20397 | Bad Performance: Wireframe mode with silhouettes and display lists
SDHV-20189 | Crash when exporting to OBJ with ‘skp’ files in the scene

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