# 3DF 27.20

Welcome to our new documentation

We are pleased to announce the release of our new documentation!

It comes with a new look-and-feel and a better navigation interface. The search feature is faster now. And in the next releases, we will be adding more fine-grained controls such as whole-word match and fuzzy search. More to come!

## Library Compatibility Information

Library Name | Version | Windows | Linux | OS X | Notes
--- | --- | --- | --- | --- | ---
DGN Direct | 4.2 |  |  |  |
HOOPS Communicator | 2022 SP1 |  |  |  |
HOOPS Exchange | 2022 SP2 U1 |  |  |  |
HOOPS Publish | 2022 SP2 U1 |  |  |  | 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.

## New Features

Custom Shaders. Standard lighting functions can be provided to shaders. Shader debugging API is now available. Shader definition and attributes can now be saved and read from HSF/HMF files.

Text Rendering Quality. Anti-aliased text appears more clearly and crisply defined.

## Fixed Bugs

Issue Number | Description
--- | ---
SDHV-19486 | Modern Shader not working depending on Topology of Mesh
SDHV-19485 | Text greeking doesn’t work
SDHV-19452 | text greeking no longer works as expected
SDHV-19435 | About Highlighting Multiple Point Cloud Data
SDHV-19427 | Deleting Modern Shader Instances deletes expired Shader Attributes
SDHV-19425 | edge pattern dashed isn’t visible in far zoom
SDHV-19414 | Zlib vulnerability (220701-000003)
SDHV-19404 | Incorrect image color when applying as texture
SDHV-19401 | Severe regression in Text zoom performance and display quality introduced in Visualize 2022
SDHV-19397 | Erratic mouse click event handling
SDHV-19350 | Save HOOPS data from middle of segment tree
SDHV-19345 | Perf Regression in V27.00 OpenGL2 w.r.t v24.41
SDHV-19344 | Exception with Hoops 3DF 2700 in std_draw_tree.cpp
SDHV-19341 | Image driver not rendering markers nicely
SDHV-19340 | Image driver lighting is not consistent
SDHV-19333 | Limitation on the number of spot light?
SDHV-19323 | Transparency algorithm Depth peeling not working as expected
SDHV-19301 | Text not showing on some specific positions.
SDHV-19277 | Incorrect animated trail when running multiple sequential animations that contain HBhvInterpolatorTrail
SDHV-19218 | Washed-out text with text anti-aliasing
SDHV-19216 | CAD face color is different in HPS 2021 SP2 U1
SDHV-11024 | Color has no diffuse component
SDHV-10985 | Text alignment issue with one character in a line
SDHV-10270 | Performance issue while selecting all cad model faces on 2590