It’s very important to understand what this product is trying to do…and what it isn’t trying to do.
If you read the interview Martin Weber is quite clear about it. He’s building a product for speed…for real-time or near real-time response.
Tachyon will hopefully rival next-gen game engines or Element 3D. He explicitly states that they are building the ‘renderer’ on OpenGL. He compares his ambitions to what can be done in Unreal 4. He never compares Tachyon to VRAY (he’s a well-known c4d VRAY user, btw) or other elite 3rd party renderers.
That being the case we aren’t talking pure ‘rendering’ as much as a displaying/presenting technology. There is no such thing in this world as multi-light bounce, and certainly not full global illumination.
He does tout ‘global illumination’ but you can be pretty certain it will be a single-light-bounce implementation where objects reflect an environmental HDRI object. Again…just compare it to Element 3D in this regard.
If you look closely when he brings up a Terminal window you’ll see the command, “Print VRAM” That tells you a lot…it’s not doing raytracing like we think about. It’s relying on what you can get with OpenGL: shadows, shading, light reflections…maybe environmental reflections.
Just like Element3d you won’t enjoy inter-object reflections. It’s results are not far removed from what you are getting in the advanced viewports with Modo 901, Maya 2015 and in the latest iteration of 3DCoat.
I think it can be an exciting product–one that I’d be interested in purchasing. But let’s not place it in the same conversation with Octane, Arnold, or VRAY. Except in limited cases, it won’t be able to achieve that kind of high-end quality.
Also of note. At the end of the video he toggled on ‘HQ’ (a high quality setting). That increased the AA smoothing and appeared to add a glow post effect. With those effects enabled it was churning out 820x460 frames at 5 seconds each. (watch the video closely)
Look people. There is no such thing as a free lunch. There is no Santa Claus or Render Fairy. This is no monster product that will give us instant renders and feature elite quality. It doesn’t exist.
But if they can really deliver, Tachyon might have a wonderful role in rapid client visualizations, story telling, conceptualizations, training animations. A clever 3d artists might be able to make a tv commercial–but that will be more the exception.