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After having tried and used these gpu rendering engines I can say that:
The fastest, full featured is Octane.
What I don't like of Octane is the lack of a full integration with 3ds Max, but I hope that Refractive will release soon the promised plugin.
Octane can open really huge scenes without crash and you can rotate them in realtime, sometime faster than the directx shading. I don't like too much overlapping wires connection because you can't zoom in-out the node scheme, you can't optimize connections, you can't rearrange, etc. You can't copy-paste and instance nodes, drag colors between slots.
By the way, the best Octane part is in the material editor. Tons of parameters, you can create infinite (?) nested materials with nodes, you have 3 rendering modes, you can render real caustics. Then we have skyportal material, very useful for well illuminated interior renderings.
The worst Octane part is the impossibility to manage every single name object. You don't have fresnel materials or subscattering options.
Arion has the best control panel, drag and drop materials, fresnel, sss materials, a better way to stack bsdf layers, a better antialiasing, no fireflies in pathtracing.
Arion is hybrid and if you got a renderfarm you can use your gpus. Arion has an offline library very useful.
The best Arion part is in the possibility to do networked rendering, very useful for animations. My dual 3.47Ghz exacore Xeon are equivalent to a one GTX580.
The worst Arion part is that it crashes a lot of time. Ok, I tested the demo beta, but all the analyzed softwares are practically betas.
Vray RT has the best integration with Max, works like Vray legacy, but lacks tons of Vray features.
Crashes with the latest Nvidia drivers. No support for procedural materials (checkerboard, noise, gradient ramps, etc.). No fresnel, no multilayered materials, no skyportals, no real caustics, no hybrid option gpu+cpu that you can turn on with the control panel, you have to add a system variable in windows and often doesn't work. Vray RT 2.0Sp1 is unstable.
The RT cpu part goes in conflict with the gpu engine, so the cpu buckets are different, you get a patchwork like rendering.
I think that Chaos has to do a lot of work with its gpu rendering engine.
The final conclusion is that Octane is the winner.
The fastest, full featured is Octane.
What I don't like of Octane is the lack of a full integration with 3ds Max, but I hope that Refractive will release soon the promised plugin.
Octane can open really huge scenes without crash and you can rotate them in realtime, sometime faster than the directx shading. I don't like too much overlapping wires connection because you can't zoom in-out the node scheme, you can't optimize connections, you can't rearrange, etc. You can't copy-paste and instance nodes, drag colors between slots.
By the way, the best Octane part is in the material editor. Tons of parameters, you can create infinite (?) nested materials with nodes, you have 3 rendering modes, you can render real caustics. Then we have skyportal material, very useful for well illuminated interior renderings.
The worst Octane part is the impossibility to manage every single name object. You don't have fresnel materials or subscattering options.
Arion has the best control panel, drag and drop materials, fresnel, sss materials, a better way to stack bsdf layers, a better antialiasing, no fireflies in pathtracing.
Arion is hybrid and if you got a renderfarm you can use your gpus. Arion has an offline library very useful.
The best Arion part is in the possibility to do networked rendering, very useful for animations. My dual 3.47Ghz exacore Xeon are equivalent to a one GTX580.
The worst Arion part is that it crashes a lot of time. Ok, I tested the demo beta, but all the analyzed softwares are practically betas.
Vray RT has the best integration with Max, works like Vray legacy, but lacks tons of Vray features.
Crashes with the latest Nvidia drivers. No support for procedural materials (checkerboard, noise, gradient ramps, etc.). No fresnel, no multilayered materials, no skyportals, no real caustics, no hybrid option gpu+cpu that you can turn on with the control panel, you have to add a system variable in windows and often doesn't work. Vray RT 2.0Sp1 is unstable.
The RT cpu part goes in conflict with the gpu engine, so the cpu buckets are different, you get a patchwork like rendering.
I think that Chaos has to do a lot of work with its gpu rendering engine.
The final conclusion is that Octane is the winner.
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