# 3DF 29.20

PLATFORM SUPPORT WARNINGS HOOPS Visualize x86 architecture is now deprecated and support is scheduled to end with 3DF 29.40 in December, 2024. As part of this deprecation, customer packages for this platform are no longer accessible from the Developer Zone. Contact Tech Soft 3D Support for access to this platform. Support for Visual Studio 2017 (V14.1) is now deprecated and is scheduled to end with 3DF 29.40 in December, 2024.

## 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 | 4.5 |  |  |  | Required for VS 2017 libraries and samples.
.NET Standard | 2.0 |  |  |  | Required for VS 2019 libraries.
.NET Core | 5.0 |  |  |  | Required for VS 2019 samples.
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 | 2023 |  |  |  | 64-bit Windows only. Requires Visual Studio 2019 Redistributable.

## Enhancements

Experimental Cellular Volumes

Cutting planes and sections now intersect cellular volume geometry and interpolate values on the resulting cut surface(s). Capping faces produced by cutting planes through cellular volume geometry can be extracted in the same way as through shell faces.

Offscreen Rendering

Offscreen rendering now handles transparent backgrounds and does not render transparent lines and markers when widnow opacity is set to zero.

3D Part Viewer

Accuracy of the percent of VRAM used by 3D Partviewer is improved.

## Functional Changes

- HC_Show_Device_Info The video memory returned by HC_Show_Device_Info is reported in Mebibyte (MiB) instead of Megabyte (MB).
- Highlights Highlights of different styles on different segments display the requested highlight. Geometry remains visible when segements with line weight greater than zero are highlighted. Individual shell vertices colored by RGBA can be highlighted.
- Face Lighting and Patterns Lighting appears correct when parts of a face are deleted. When HC_Set_Driver_Options(“window opacity=0”) is set the face pattern applied is also rendered.
- Show_Owner_By_Key Show_Owner_By_Key returns with correct key in the C# interface.
- Windows SDK Support All Windows platform sandboxes have been updated to Windows SDK 10.0.22621.3233.

## Fixed Bugs

As of Apr 29, 2026

Issue | Description
--- | ---
SDHV-20659 | HC_Show_One_Heuristic returns wrong value for quick moves
SDHV-20635 | Selection element offsets 1, 2 and 3 are constantly zeros after ray selection on a polycylinder
SDHV-20581 | Disappearing LineKeys after highlighting LineKeys on the same parent segment key
SDHV-20567 | Compute_Triangulation stuck in endless loop
SDHV-20566 | Show_Owner_By_Key gives invalid key when geometry was imported from JT file with m_bPRCMergeFaces set to true
SDHV-20563 | Round trip bug - Texture matrix not saved in HSF
SDHV-20512 | Disruption of Shell Faces Upon Deletion of Subfaces Using HC_Delete_Specific_Shell_Faces[240301-000015]
SDHV-20503 | Face Pattern fails at offscreen rendering
SDHV-20438 | Offscreen Image driver not rendering lines and markers with ‘window opacity=0’
SDHV-20416 | d3dcompiler_47.dll is outdated
SDHV-20413 | Isolines are displayed where there is no shell[231219-000000]
SDHV-20014 | Shader: texcoord1 fails on offscreen rendering
SDHV-19751 | Volume Rendering and gas/liquid rendering
SDHV-19607 | Is is possible to set a highlight on the back face that is different than the front face?
SDHV-10683 | Liquid rendering with HOOPS Visualize 3DF version 26.0 or < 26.0
SDHV-5199 | Need clarification regarding being able to render Fluids/ Gases

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