View Full Version : Corona renderer

03-19-2013, 03:04 AM
Corona Renderer (http://corona-renderer.com/)

Corona renderer is new (un)biased photorealistic renderer, fully integrated into 3ds MAX, developed by Ondra Karlík since 2009.
It is still under heavy development and as such does not support some features and is not as stable as the final product will be.
Yet still, it can produce high-quality results, as shown on top of this page, and multiple people use it in production.

Main souce of informations is currently the Corona forum (http://corona-renderer.com/forum), as there is no proper
website yet. There is an open alpha-test going on - everyone can download (http://corona-renderer.com/forum) and use
Corona for free after registering on the forum!

Some of the supported features are:
Full 3ds MAX integration
Unbiased rendering with path tracing, light tracing, and bidirectional path tracing
Biased rendering with irradiance cache, secondary cache, and regular/progressive photon mapping
Corona material supporting: diffuse, reflection, refraction, translucency, opacity, bump mapping, displacement, emission, and anisotropy
Physical sun & sky, area lights, and fast geometry lights
Physically correct depth of field and motion blur simulation
Progressive and bucket rendering modes
Own simple and fast scattering and proxy plugins, custom texmaps


Frequently asked questions
What are the minimum hardware requirements?
There are two versions of Corona - standard and legacy. The standard one uses the SSE4.1 instruction set to achieve maximum speed on modern CPUs, and needs an Intel i3/5/7 CPU or newer Core 2 (e.g. 9xxx). Legacy version should run on all CPUs of the last decade, but is about 20% slower.
What are the minimum software requirements?
You currently need an x64 3ds MAX 2011, 2012, or 2013 running on Windows Vista or newer.
Is Corona CPU or GPU based?
It is entirely CPU based with no intention of making a GPU version in the forseeable future. The reason is that the CPU version is fast enough, and there would not be nearly enough speed improvement to justify the amount of changes required and reduced flexibility.
Is Corona biased or unbiased renderer?
It is both. It does not follow the traditional division and tries to combine the best of the two worlds - the speed and flexibility of biased renderers with the image quality and simplicity of unbiased ones. As such, it supports both unbiased and biased rendering modes, that can be additionally combined together to get the best bias/noise ratio.
Is Corona commercial software?
Currently, it is free to use, but there are plans to make it commercial in the future, after it is fully developed. It will however always have some free versions, and active betatesters will get access to the full versions for free.
Will Corona support 3D packages other than 3ds MAX?
This is definitely planned. The architecture of the renderer is prepared for it from the beginning.
What are the plans for the future?
Main priorities are to add the last remaining "big" unsupported features, such as SSS, distributed rendering, interactive rendering, etc., then create better user interface, and try to build wide user-base.

03-19-2013, 04:07 AM
Awesome quality! Not a bad thing to have in LW

03-25-2013, 12:55 AM
Corona benchmark scene in Lightwave v.11, brute force MC (no interpolated), 2 bounce, RPE 8, Min Samples 3/Max samples 32, threshold 0.005/oversampling 0.5:
1 hour 24 minutes on 2x Xeon E5-2650/32 RAM/120 SSD

Corona render 3m 23s:

Lightwave scene (http://dfiles.ru/files/uq70bp1o7)
Corona benchmark scene (http://corona-renderer.com/forum/index.php/topic,559.0.html)

03-25-2013, 03:07 AM
I've done a test with Vray yesterday and by using IC and LC the output was comparable(amount of noise) and Vray was bit faster:) but that's like comparing apple and oranges, Corona is still in early development and there's a load of features missing, once the dev add them the renderer will slow down to the same level as cycles, Maxwell family. There are some early test on his page with comparisons with Vray and while corona seems to be faster in most scenarios(by around 20%) the amount of noise is crazy, while the same render in vray is almost noiseless.

03-28-2013, 10:53 PM
Another test - I tried to recreate the effect of the Crown means by brute force GI in LW. Of course this is not a physically correct way, in fact there is not a solid glass, is a hollow tube, inside of which is a great level of reflection. On the other hand it is clear that LW has a pretty good Monte Carlo engine that if finish will be as good or much better than Maxwell, or Arnold.
LW non-interpolated MC:
Corona render: