The updated Physical Material now supports Thin SSS (for frosted glass and realistic leaves) and Sheen (for fabrics like velvet).
Before dissecting the Hotfix 2, it is essential to understand the foundation. Corona Renderer 11 (initial release) was a landmark update. It introduced the Corona Pattern Modifier (a tiling engine that rivals Substance Designer), Curve Control in tone mapping, and significant memory optimizations for large scenes.
However, version 11.0 had some "teething problems" across different 3DS MAX versions—specifically crashes related to the Corona Camera, material editor slowdowns on older CPUs, and network rendering inconsistencies with MAX 2024 and 2025.
Enter Hotfix 2—the second iterative patch designed to resolve these post-release issues without changing the core feature set. For studios still running MAX 2016 (a surprisingly common version for legacy asset pipelines), this hotfix is a lifeline, ensuring compatibility with modern rendering standards.
Corona Renderer 11 Hotfix 2 for 3ds Max, released on April 15, 2024
a maintenance update specifically designed to bridge compatibility gaps with the then-new 3ds Max 2025
while addressing critical stability issues found in the initial Corona 11 release Key Fixes & Improvements According to the official Chaos Corona Forum , the update focuses on: 3ds Max 2025 Compatibility : Ensures full support for the latest Autodesk version. OCIO Color Management
: Added a warning specifically for users utilizing the OCIO workflow, noting that Corona does not yet fully support it. Caustics & VFB Stability
: Resolved rare "NAN" (Not-a-Number) errors in both the Caustics solver and the Virtual Frame Buffer that previously caused visual artifacts or crashes. Chaos Scatter Optimization
Fixed a bug where scenes with Chaos Scatter would hang indefinitely during loading. Corrected an issue where the
tool forced a recomputation of scattered objects, causing significant viewport lag. Edge Trimming accuracy for hierarchical or grouped models. Automated Gamma Correction
: The "Gamma Correction" operator added in Hotfix 1 was removed in favor of an automated system that applies correction based on your 3ds Max settings. Major Features of Corona 11
If you are upgrading from an older version, Hotfix 2 includes all the core features introduced in the Corona 11 release Corona Tile Map
: A procedural system for creating complex tile patterns (bathrooms, kitchens) without external textures. Scatter Altitude & Look At
: Tools for more realistic nature scenes (limiting growth by height) and orienting scattered objects toward a target.
: Procedural weathering and staining effects applied specifically to object edges. Corona Forum Corona Power Tools : A new toolbar featuring scripts like Object Replacer Pivot Placer Scene Cleaner to speed up tedious manual tasks. Compatibility & Installation Supported Versions : 3ds Max 2016 through 2025. Installation Tip
: It is highly recommended to uninstall previous versions of Corona before running the new installer to ensure a clean setup. : The update is available directly from the Chaos Corona Download page or how to set up the new Corona 11 (Hotfix 2) released for 3ds Max
Corona Renderer 11 Hotfix 2 for 3ds Max (released April 15, 2024) primarily focuses on adding compatibility for Autodesk 3ds Max 2025 Corona Forum
. This update is recommended for all Corona 11 users to ensure stability across 3ds Max versions 2016 through 2025 Key Fixes and Improvements
The following technical issues were resolved in this hotfix: Caustics & VFB Stability:
Fixed rare instances of "NaN" (Not a Number) errors occurring in the Caustics solver and the Visual Frame Buffer (VFB) Corona Forum Chaos Scatter Fixes: Resolved an issue where certain scenes using Chaos Scatter would fail to finish loading Corona Forum
Fixed a performance bug where using the "Isolate" tool caused Scatter to recompute, slowing down viewport interaction Corona Forum
Corrected edge trimming map detection and display for group/hierarchical models Corona Forum
Fixed filtering for include/exclude areas in on-spline scattering Corona Forum Color Management:
Removed the manually added Gamma Correction operator; Corona now automatically applies correction based on 3ds Max's color management settings Corona Forum Added a warning notification for cases where OCIO color management is not fully supported Corona Forum Core Corona 11 Features
As part of the broader Corona 11 release, users also have access to these major features: Corona Tile Map:
Allows for procedural creation of complex tiled surfaces like bathrooms and kitchens Corona Forum Scatter Look At & Altitude: Corona Renderer 11 Hotfix 2 for 3DS MAX 2016-20...
New scattering controls to make objects face a specific direction or restrict them to certain height ranges (e.g., treelines or waterlines) Corona Forum
A tool for easily applying weathering, staining, or other effects specifically to object edges Corona Forum Intel Denoiser:
Improved denoising that can run on both CPU and GPU, removing the strict requirement for NVIDIA hardware Corona Forum Power Tools introduced in version 11 or how to configure the Intel Denoiser
Chaos Corona 11 Hotfix 2 for Autodesk 3ds Max (versions 2016–2025) was released on April 15, 2024
. This update is primarily a maintenance release that provides critical compatibility updates and bug fixes for the major Corona 11 release Key Updates & Improvements 3ds Max 2025 Compatibility
: The most significant addition in this hotfix is official support for Autodesk 3ds Max 2025 Color Management : Added a warning for OCIO color management workflows that are not yet fully supported. Stability Fixes Resolved rare "NAN" (Not a Number) errors in the Caustics solver (Virtual Frame Buffer). Fixed an issue where scenes using Chaos Scatter would occasionally fail to finish loading.
Corrected "edge trimming" tooltips and hierarchical model instance behavior. Workflow Adjustments
: Removed the Gamma Correction operator introduced in the previous hotfix; Corona now automatically applies correction based on the 3ds Max host settings. Version Requirements Host Software : Autodesk 3ds Max 64-bit, versions 2016 through 2025. Operating System : 64-bit Microsoft Windows 8, 10, or 11. : CPU must support the instruction set. Autodesk App Store
Users of Corona 11 for 3ds Max can download the installer directly from the Chaos Corona download page Further Exploration Read the full official release notes
on the Chaos Corona Forum for a detailed list of every bug fixed in Hotfix 2. Explore the original Corona 11 announcement
to see the major features introduced before this hotfix, including the Corona Tile Map Scatter Altitude Chaos Documentation for help with installation or license activation. or finding information on the latest Corona 12 features Corona 11 (Hotfix 2) released for 3ds Max
Corona Renderer 11 Hotfix 2 for 3ds Max includes the following primary features and improvements:
3ds Max 2025 Compatibility: This update officially introduces support for Autodesk 3ds Max 2025 . Chaos Scatter Enhancements:
Scatter Altitude: Allows users to set upper and lower limits for scattering, making it easier to create realistic treelines, waterlines, or cloudy mountain tops .
Scatter Look At: Provides a way to orient scattered items in a single direction, such as a crowd looking at a stage .
Improved Reliability: Fixes issues where scenes with Chaos Scatter might never complete loading or where using "Isolate" would cause slow viewport interaction due to recomputation .
Corona Power Tools: A set of scripts designed to automate repetitive design tasks, including:
Object Replacer: Easily swap selected objects with a different model .
Randomizer Tools: Includes Transform Randomizer for position, rotation, and scale, and Selection Randomizer for thinning out large numbers of objects .
Pivot Placer & Scene Cleaner: Tools to adjust object pivot points or clean up unnecessary data like animation keys or layers . Material and Shading Updates:
Corona Tile Map: A procedural map for creating complex tile patterns for walls and floors .
Edge Map / Edge Shader: Simplifies adding weathering or staining effects to the edges of thin objects like leaves or paper .
Improved Bump Filtering: Reduces detail loss in normal or bump channels when objects are far from the camera . Performance and Stability:
Updated Intel Denoiser: Now supports version 2 and is compatible with both CPU and NVIDIA GPU for faster, cleaner renders .
Bug Fixes: Addresses rare "NaN" (Not a Number) errors in the caustics solver and VFB (Virtual Frame Buffer) .
Color Management: Includes warnings for OCIO color management workflows and removes the manual Gamma Correction operator in favor of automatic detection . Chaos.Corona.11.Hotfix.2.for.3ds.Max.2016-2025.x64.WIN The updated Physical Material now supports Thin SSS
Chaos Corona 11 Hotfix 2, released on April 15, 2024, is a critical update primarily designed to provide official compatibility with Autodesk 3ds Max 2025. It is highly recommended for all users working within the 3ds Max 2016–2025 range to ensure stability and access to corrected features. Key Improvements & Fixes
This hotfix addresses several performance bottlenecks and stability issues found in the initial Corona 11 release:
3ds Max 2025 Support: Full integration and stability for the latest 3ds Max version.
Color Management: Added a warning for OCIO (OpenColorIO) workflows, noting that they are not yet fully supported. Chaos Scatter Fixes:
Resolved an issue where scenes with Chaos Scatter might fail to finish loading.
Fixed a bug where using the Isolate tool caused Scatter to recompute, slowing down the viewport.
Fixed edge trimming inaccuracies for hierarchical or grouped models.
Rendering Stability: Fixed rare NaN (Not a Number) errors that caused crashes or black pixels in the Caustics solver and the Virtual Frame Buffer (VFB).
Gamma Handling: Removed the manual Gamma Correction operator; Corona now automatically applies the correct settings based on your 3ds Max color management configuration. Installation Guide
For the most stable setup, follow these steps using the official Chaos download portal:
Clear Previous Versions: It is recommended to uninstall any existing Corona 11 versions via the Windows Control Panel to prevent file conflicts.
Run the Installer: Choose the Typical installation for a standard setup. It will automatically detect your 3ds Max versions (2016-2025) and install the necessary plugins.
Material Library: The installer will download roughly 5.2GB of material data. Ensure you have a stable internet connection.
Activation: Once installed, open 3ds Max and navigate to Render Setup (F10) to select Corona as your active renderer. Core Corona 11 Features
Since Hotfix 2 is an update to the base Corona 11 release, you also gain access to these major version 11 features: Corona - Facebook
Released on April 15, 2024, Corona Renderer 11 Hotfix 2 for Autodesk 3ds Max (2016–2025) introduces official compatibility with 3ds Max 2025 and resolves critical stability issues, including NaNs in the VFB and Caustics solver. This update also refines Chaos Scatter performance and clarifies OCIO color management workflows, while retaining major features from version 11 such as the Corona Tile Map and Power Tools. For full details on the release, visit the Corona Renderer Forum. Corona 11 New Feature Highlight (Webinar Recap)
Corona Renderer 11 Hotfix 2 for Autodesk 3ds Max (2016–2025) was released on April 15, 2024. Its primary purpose was to introduce compatibility for the 2025 version of 3ds Max and resolve several critical stability issues identified in the initial Corona 11 release. Key Updates & Improvements
Version Support: Added full compatibility for Autodesk 3ds Max 2025. Color Management:
Added a warning for incomplete support of OCIO color management workflows.
Removed the Gamma Correction operator introduced in the previous hotfix; Corona now handles corrections automatically based on 3ds Max's internal color management settings. Chaos Scatter Fixes:
Resolved a bug where scenes using Chaos Scatter could hang indefinitely during loading.
Fixed performance lag in the viewport when using the "Isolate" tool with Scatter.
Improved edge trimming logic for hierarchical/group models and fixed area filtering for on-spline scattering. Bug Fixes & Stability
Caustics & VFB: Addressed rare "NaN" (Not a Number) errors that caused artifacts in the Caustics solver and the Virtual Frame Buffer (VFB).
UI Corrections: Fixed the display of edge trimming tooltips and map usage detection for groups. Core Features of Corona 11 (Main Branch)
While Hotfix 2 focused on stability, it maintains all major Corona 11 features: Corona Renderer 11 Hotfix 2 for 3ds Max,
Corona Tile Map: For procedural creation of complex bathroom and kitchen surfaces.
Edge Map: Allows for easy weathering and staining effects on object edges.
Scatter Altitude/Look At: New ways to control object distribution based on height or orientation.
Intel Denoiser: Updated to support GPU denoising on non-NVIDIA hardware. System Requirements
Software: 3ds Max 2016 through 2025 (and 3ds Max 2026 in later versions of the engine). OS: 64-bit Windows 10 or newer.
Chaos has released Corona Renderer 11 Hotfix 2 for 3ds Max, an essential stability update that expands compatibility and resolves critical technical issues for users working with 3ds Max versions 2016 through 2025. While the initial Corona 11 release introduced major workflow enhancements like the Corona Tile Map and Scatter Altitude, this hotfix focuses on ensuring a seamless experience in the newest software environments. Key Updates in Hotfix 2
The primary goal of this update is to address bugs that could cause render failures or system instability.
Autodesk 3ds Max 2025 Support: This hotfix officially brings compatibility for 3ds Max 2025, ensuring that the renderer functions correctly within the latest iteration of the host software. Color Management Improvements:
The Gamma Correction operator, which was added in the previous hotfix, has been removed. Corona now automatically applies the necessary correction based on your 3ds Max color management settings.
An improvement includes a new warning for users if Corona does not fully support their current OCIO color management workflow.
Caustics and VFB Stability: The update fixes rare "NAN" (Not a Number) errors in both the Caustics solver and the Virtual Frame Buffer (VFB), which previously caused renders to fail or display incorrect black/white pixels. Chaos Scatter Optimization:
Resolved an issue where certain scenes containing Chaos Scatter might never finish loading.
Fixed a bug where using the "Isolate" tool would force Scatter to recompute, which significantly slowed down viewport interactions.
Addressed incorrect edge trimming for hierarchical and group models, ensuring that instances are clipped accurately along boundaries. Core Features of Corona 11
Hotfix 2 maintains all the powerful procedural and performance tools introduced in the main Corona 11 release:
Corona Tile Map: A procedural tool for creating complex patterns for bathrooms, kitchens, and floors without relying on external bitmaps.
Scatter Altitude and Look At: New controls for Chaos Scatter that allow you to define height limits for vegetation (e.g., treelines on mountains) and orient scattered objects toward a specific target.
Edge Map: Simplifies the process of adding weathering, staining, or "worn-out" effects to the edges of objects.
Intel Denoiser: Now supports both CPU and GPU denoising, removing the strict requirement for NVIDIA hardware to achieve clean renders quickly. Installation and Download
Users with an active subscription can update through the Corona Download Page. It is recommended to uninstall previous versions of Corona before running the new executable to prevent installation conflicts. For those using the standard material library, note that the additional 5.2 GB download may be required upon first installation. Corona 11 (Hotfix 2) released for 3ds Max
Released on April 15, 2024, Corona Renderer 11 Hotfix 2 for Autodesk 3ds Max (2016-2025) adds official 2025 support and resolves critical stability issues, including Chaos Scatter hangs and NAN errors in the Virtual Frame Buffer. The update also adjusts color management workflows and removes the previously added "Gamma Correction" operator in favor of automatic 3ds Max settings, according to the official forum. For full release details, visit Chaos Corona Forum. Corona 11 (Hotfix 2) released for 3ds Max
Corona Renderer 11 and its hotfixes officially support 3ds Max 2016 to 2024 (and later up to 2025/2026 depending on the specific hotfix). So your range (2016–2020) is fully covered.
Below is a feature-focused summary of Corona 11 Hotfix 2 relevant to those Max versions.
Corona Renderer 11.2 (HF2) is the last version that supports 3ds Max 2016.
Corona 12 (released later) drops Max 2016 support. So if you stay on Max 2016, Corona 11 HF2 is your final compatible version.