[MCX Newsletters] MCX Suite v2025.10 is here!

[Qianqian Fang]

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Dear MCX/MMC registered users,

I am excited to announce MCX/MMC v2025.10 - a stable release that brings international language support (MCX), faster simulations (MCX-CL/MMC), critical bug fixes (MMC) and across-the-board Python support (pmcx/pmcxcl/pmmc) to our global user community. Everyone is encouraged to update!

Please go to our website https://mcx.space, or use the following link to access the latest packages


https://mcx.space/wiki/?Get


I would like to highlight some of the key updates below:


=== MMC critical bug fix ===

• A critical bug related to normalization was found and fixed for MMC, affecting MMC v2025 (released in Feb 2025). The bug produces inaccurate normalization factor - the fewer the cores/blocks (such as on the CPU), the less accurate. You are urged to update your MMC/MMCLAB with this new release.

=== MCX/MCXStudio ===

• [i18n] MCX and MCX Studio add international language support, supporting Chinese (zh_CN and zh_TW), French (fr), Spanish (es), Germany (de), Japanese (ja), Korean (ko), Hindi (hi) and Portuguese (pt)
• [i18n] MCX Studio Windows installer also allows users to choose language during installation
• [pmcx] a dozen MATLAB-based MCX data processing functions (mcx2json,json2mcx,plotphotons,preview,...) were ported to Python/pmcx, unit-tested
  
• [feature] creating frequency-domain Jacobians in the replay mode - contributed by Paulliina Hirvi and Jarno Rantaharju
• [feature] multi-source photon replay
• [bug] fix mcxstudio incorrect 3D rendering of column-major array produced after v2024.2
• [mcxstudio] the mcxstudio installer also installs iso2mesh and redbird (a new DOT toolbox) alongside with mcxlab/mcxlabcl/mmclab
  

 === MCX-CL ===

• [port] multi-source simulation ported from mcx
• [port] hyperboloid/ring/expanded slit source types ported from mcx, new mcxlab/mcxlabcl srctype demo unit
  
• [port] Russian roulette and multi-source replay ported from mcx
• [opencl] enable optimization level 3 (--optlevel 3) by default, boosting speed by 30%-100% on various devices
• [pmcxcl] pmcxcl now supports Apple silicon
• [opencl] tested and optimized for Arm Mali GPU (Orange Pi), accelerating by 6x
• [mcxlabcl] use USE_MCXCL>0 to specify default OpenCL device globally
  

=== MMC ===

• [pmmc] brand new mmc module for Python, paired with the new pyiso2mesh module for mesh generation
  
• [pmmc] pmmc supports Apple silicon
• [port] support focal-length, isotropic/Lambertian launch via cfg.srcdir(4), like in mcx/mcxcl
• [opencl] enable optimization level 3 (--optlevel 3) by default, boosting speed by 30%-100% on various devices
• [bug] fix immc photon-leakage bug (thanks to Aiden Lewis)
• [bug] allow immc to run on Apple silicon, previously immc was not compiled with omp target
  

An animation showing installing and running MCX Studio with international language support can be found here

https://mcx.space/tutorials/install/mcxstudio_v2025_10_installer.mp4

Windows users - you can also install the entire MCX suite v2025.10 using the below winget command on Windows 10 or later

winget install mcxstudio

For Python users, you can directly install pmcx/pmcxcl/pmmc using pip

python3 -m pip install pmcx pmcxcl pmmc iso2mesh

If you use docker, all mcx/mcxcl/mmc docker images (https://hub.docker.com/r/fangqq/mcx) have also been updated, you simply pull and run

docker pull fangqq/mcx:v2025.10
docker run --rm --gpus all "fangqq/mcx:v2025.10" mcx -L

enjoy the enhanced mcx/mmc and happy modeling!

Qianqian