thanks Nicolas – sounds very good. the images as well as the video look very promising – my interest is certainly aroused .
From: Nicolas Burtnyk Sent: Sunday, March 17, 2013 7:33 AM To: [email protected] Subject: Re: Announcing Redshift - Biased GPU Renderer Hi Peter, First of all, let me apologize for taking forever to respond. We've had a pretty crazy last couple of days with the alpha launch. You're absolutely right that speed is worth very little or even nothing if you can't actually get the image you or the client wants out of the damned thing, whether it's due to missing features, stability issues, limitations on content complexity, lack of flexibility or ease of use. We're very sensitive to that and while I can't claim that we're there yet, we do plan to have all the bells and whistles, stability, flexibility and ergonomics to make Redshift a legitimate choice for production rendering. That being said, speed can be important for a number of reasons. A big one is iteration times. Everything else being equal faster rendering results in better images because you have more opportunity to iterate, experiment, tweak and generally be creative. Another one is cost. This will vary a lot for different types of users, but if you suddenly don't need a render farm because your workstation renders just as fast, you've saved money. Or if you need a farm with only 100 nodes instead of 1000, you've saved some more money. I should point out that Redshift doesn't just do basic raytracing and GI but actually already supports many of the features you mentioned. We do point-based SSS, motion blur (not deformation blur yet, but we're working on that right now), instancing and refractions. For a 3rd party renderer, I would say that our support for the native Softimage shaders is probably about on par or possibly better than the others. And we're not done yet! Proper ICE support is a big one, as is proper support for AOV/render channels. Hair is another. These are all in the plan and have already had some significant thought (and in some cases initial work) put into them. -Nicolas On Thu, Mar 14, 2013 at 1:21 AM, <[email protected]> wrote: > Please also bear in mind that we're still just in alpha and constantly improving performance. We're kind of obsessed with speed :) speed is great of course – but IMO it’s not the most important factor. over the years we have all been doing productions with rather long rendertimes, running into hours per frame and more. The bottom line was rarely “it has to be rendered in X amount of time” – clients couldn’t care less. It has to be good enough first and rendered in time for delivery. it’s been a long time I’m looking forward for a viewport/GPU mental ray replacement in softimage. Hopefully staying below 5 minutes for complex HD images and within 1 minute for more simple stuff – but more importantly, it should have the bells and whistles of a modern raytracer, and deliver production quality rendering – that can be very precisely tweaked by the user. It’s very frustrating to get a promising image very fast, but not being able to make the image really final - some remaining artifacts, sampling problem or no ability to finetune this or that effect or simply lack of a feature you really require – so in turn you have to bite the bullet and go back to good old offline rendering – and the corresponding rendertimes will be twice as frustrating. Very extensive support for lighting features – not just GI / AO / softshadows / softreflections – but also SSS, raytraced refractions, motion blur, volumetrics, ICE support, instancing, hair – and a good set of shaders and support for the rendertree and as many of the factory shaders as possible. Mental ray never became the standard it was because of speed – but because of what one can achieve with it. (and then you have to turn off a few things left and right for final renders in order to make rendertimes acceptable) Obviously in this day and age it’s features are getting long in the tooth as well, which opens the door wide open for others – but it remains a reference for what a renderer should at least aspire to. just some thoughts and hints of what matters to me when considering a new renderer.
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