Corona Alpha7 is out!

Corona Renderer V7

Exactly 3 months and 13 days after releasing Alpha V6 we are back with the fresh new version 7. We would like to commit to this fast-paced development also for the future releases – we hope to deliver up to three versions per year – so you will be always able to get your hands on the latest tech as soon as possible. You can download it here – or continue reading about the new features ;). We are also including a sample scene with Corona set up with this release. There is also a dedicated A7 thread on the forum.



In fact, this version was supposed to come out a little bit later, labeled as BETA. But due to the release of Autodesk 3ds Max 2015, we had to rush it a bit and shift some major changes to following release.
For this reason we have decided to keep name Alpha 7. This version might not be as glitzy as A6, but it is equally important. Apart from adding new features , we have also fixed some major bugs,  polished UI, and concentrated on the general workflow.

Because of this we have decided to ditch our Beta Premium plans. This way we can:

  1. Keep Corona Renderer without price tag for as long as possible  (Alpha 7 is still FREE).
  2. We want to focus more on developing the product itself, rather than spending time on unessential tasks ( like official guaranteed support which we had in plan for Beta)
  3. We want to keep locked on target with our final release date for 3ds Max (Q3-Q4/2014)



  • As you might have realised, we have finally established a company, called Render Legion. It is Independent, Self-funded and Bullshit free.

Render Legion Logo

  • Corona Renderer for Cinema4D reached Alpha phase and it will soon be released for public testing.
  • Jarda and Ondrej will attend Siggraph(1,2,3) as lecturers later this year.
  • We have grown our team of external contributors – Pavel Vojacek & Miro Kurcik are helping us with some useful scripts.
  • The list of supported renderfarms has grown to 6 and 1 more are in implementation phase
  • The results of the “The most wanted feature” poll clearly shows what you crave the most:  Multi-Layer Material, SSS, Adaptivity and Interactive rendering. So we will do our best to make that happen by the next release.
  • We are working on many backbone processes like website, support, licencing, pricing and so on.
  • We were nominated for 3D world CG AWARDS 2014
  • We are also including a sample scene with this release.



  •  Corona Renderer is still FREE TO USE, for any commercial or non-commercial jobs, without stuff like watermarks or resolution limits.
  • Alpha v7 is time-limited version, and will not work after 31. 12. 2014. After that date new activations will not be issued, and users will be required to update to commercial, student or possibly free licence.
  • Alpha v7 requires one-time online activation. This process is fast, simple, and free. For most users it is done automatically, with no input required.
  • The forum registration is no longer required to download A7. In fact, here is the download link ;).



AUTODESK 3ds Max 2015

Max 2015 is now supported. Its improvements of Nitrous have allowed us to drastically increase viewport performance of Corona Scatter.

Autodesk 3ds Max 2015 Logo

 SmartProxy – .CPROXY

  • Added new, intelligent universal proxy format: .cproxy.
  • The format is cross platform (you will be able to use it in Cinema4D, Maya and standalone or in any other future platform).
  • Uses compression it is 3x times smaller and therefore faster to read/load or upload to renderfarms (great for users with slow internet connection).
  • Proxies are now saved always in millimeters, and are properly scaled when loaded into scene using different units.
  • Older formats are still supported, and automated solution is provided to batch convert all existing proxies into the new format.
  • Point cloud is now area-sampled – points are distributed evenly

proxy display

  • Contains  human-readable metadata, like the name of the source object and its material at the beginning of each file (script friendly)

.cproxy data



Added viewport illumination from CoronaLights and CoronaSun to both D3D and Nitrous viewports

corona renderer viewport lights



Significantly cuts down the time needed after each rendering to send results to 3ds max.

Corona Renderer Quick Cancel



Added a new Shadow Catcher material for compositing rendered objects into real camera footage. The material allows compositing directly in 3ds max, or in postproduction, and comes with easy to use, integrated “Camera map per pixel” functionality.

Corona Renderer shadowcatcher



Added support for particle flow and simple particle systems, complete with true motion blur, particle age, and particle mblur maps.

Corona Renderer pflow



Color mapping controls are directly in the VFB. They are also linked with the controls in render settings.

Corona Renderer VFB colormap



Added support for spherical and cylindrical cameras.  A script by Martin Geupel is available to create a web browser presentation with single click.

Corona Renderer Panorama



Officially bundled script by Pavel Vojacek for fast & convenient proxy creation from the quad menu:

Corona Renderer Proxy Exporter



  • Updated material convertor by Martin Geupel is bundled with the installer. It allows fast & convenient material conversion. You can run it with MENU > MaxScript > RunScript > It converts 17 material types, incuding Standard, VrayMtl, and MR_ArchAndDesign.Corona Material Convertor
  • Added the property “Invisible in masks” to CoronaMtl
invisible in masks
(click for enlarge)
  • New VFB skin

vfb skin

  • Small UI fixes and improvements
  • Default VFB internal resolution changed to 1, resulting in faster VFB updates and 75% less memory consumption
  • Added support for Shell material
  • Added option to use textures with CoronaLight object
  • Fixed occasional incorrect reflections when using portals
  • Default displacement value changed to 1cm
  • Added support for water level (height cutoff) to displacement
  • More visually plausible output of Kelvin temperature color in all lights/textures
  • Faster CoronaSky parsing
  • Added Corona display and selection filters to 3ds max
  • Added option to directly pick object from scene when creating proxies



  •  Restored online interactive help for users without access to 3ds max tooltips (Corona Renderer for Cinema4D and Standalone users – Note that this help is generated automatically directly from 3ds max and will be updated with each new version)
  • All popup error messages now respect 3ds max silent mode – they no longer show when doing network rendering (via backburner, Corona DR, …). Error messages are instead printed into the 3ds max console/log
  • Improved the DR dialog, added ability to load IPs from file, added ability to save images from slaves to disk for debugging, sidebar is now displaying number of updates and passes from all slaves.
  • Improved HD cache save/load, added incremental pre-computation option.
  • Better viewport display of materials
  • Faster display of CoronaProxy meshes in viewport when using Nitrous
  • The state of render settings tabs and VFB sidebar is now saved into the .max file
  • Instant Cancel Render option without saving anything (Press and hold Stop button in VFB)
  • Added option to Save All Render Channels into separate files (Press and hold Save button in VFB)
  • Improved support for programmers/renderfarms: added string render options, new maxscript functions, and Corona EXR metadata.



  •  Massively decreased the incidence of self-intersection-related problems (light leaks in corners, fireflies on curtains, …)
  • Fixed crashes when running Corona with custom processor affinity
  • Fixed random crashes when using motion blur.
  • Fixed noise pattern not remaining constant when rendering an animation with a constant seed.
  • Fixed problems with different scatter objects randomly glitching in some frames.
  • Asset tracker no longer displays blank assets in Corona proxy/light
  • Fixed problem with pixel rendering pattern not being  random for extreme resolutions.
  • Improved HD cache accuracy in animations with textured scenes
  • Fixed custom bokeh images randomly not working
  • Fixed excessive memory consumption in some types of geometry-heavy scenes

This is all from us. You can tell us what you think in the A7 thread on the forum. We’d like to hear all your opinions, positive and negative.

Adam & Ondra

18 thoughts on “Corona Alpha7 is out!

    1. Why not upgrade to Windows 8.1? Microsoft has ended all XP support, I have no idea why you’d want a slower, less secure OS.

    2. Upgrade to win7.
      Several people I know are totally disappointed by Win8.
      I’m a happy user of Corona on win7 😉

  1. A bit late since I’ve been away working, but it’s great to come home and see a new release 🙂 I’m really looking forward to playing with it.

    Still, the most impressive thing to me is the amazing speeds that are reached on CPU alone! I know many are jumping onto the GPU pathtrace bandwagon, but if you keep this up, you may just start your own wagon 😉

    That paper on progressive importance sampling/guided path-tracing/’importons’, any plans to implement that in the alphas, or will that be saved as a game changer for the final release?

    So far I haven’t had too sever firefly and noise issues, but when I did, I tried removing them in post. Unless there’s a way in Corona that I’ve been missing. (Please correct me if so).

    I read that Octane has a built in firefly/noise removes, it’d be interesting to know how that works. And Arion can generate a stable noise pattern, which I’m sure that a rendered reference frame could be used in a post program to counteract the nosie.

    Best regards, and thank you!

    1. The paper will probably not be implemented in Corona in the published form, because most users prefer to get rid of the noise in different ways. We may however use some parts of it to accelerate the biggest dealbreakers, like environment lighting.

  2. Quick Question: Where are the Post Processing settings (intensity multiplier and highlight burn) in Alpha 7?

    I’m using:
    3D max 2011
    Corona Alpha 7

    Please help.

  3. Does it support volume rendering..?? Like FumeFX…That would be a ass kicker feature.

    Keep Awesome work.

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