Redshift - Biased GPU Renderer, what do you think ?

[bigbossfr]

Hi,
I see this new render engine today : http://www.redshift3d.com/

Redshift supports multiple biased global illumination techniques: Brute-Force GI, Irradiance Cache (aka Final Gather), Irradiance Point Cloud (aka Light Cache) and Photon Mapping (GI and Caustics) - all fully GPU accelerated and performing many times faster than similar CPU-based solutions. As a biased renderer, Redshift provides you with the flexibility to tune your settings where it counts to achieve noise-free results faster when compared to unbiased renderers. People familiar with Mental Ray or VRay will feel right at home with Redshift.

My question is : VRay RT is unbiased. Does VRay RT can be biased, and use "biased technology" (LC, IR) from VRay ?

[vlado]

It can be done, obviously. If you are asking whether we will do it - I can't say for the moment.

Biased solutions will always have issues - artifacts, splotches, light leaks. I personally am looking forward to the day when we won't need them.

Best regards,
Vlado

[Micha]

For me unbiased rendering is wasting time and money. I would like to see a more biased RT too. The pure PPT is to slow. I think the redshift 3d renderer looks very promising, biased GPU rendering could help to save a lot of render time. I hope Vray will grow in biased GPU directed too.

Some years I did some tests with Vray, the idea was that the final pass is rendered progressive. I wished this could be implemented.
http://forums.chaosgroup.com/showthr...ha+progressive

[vlado]

Well, there is the light cache on the GPU now, which is a biased solution and it works remarkably well.

Best regards,
Vlado

[Micha]

Vlado, do you think there is a chance to get a progressive render mode for the final beauty pass (CPU)? I like LC and IM for high res still images, great speed, but the final pass is hanging on details some times where I wish, a progressive pass would allow me to get the whole image done until the quality is good enough. Impressive to see that redshift doesn't use buckets for the IM.

Here at Rhino the GPU rendering isn't fun, to much limits and the speed of the CPU RT isn't useable for interiors. My impressions was the PPT cause the slow speed. But maybe the LC GPU feature is useable at Vray 3, but there is big gap between core development and plugin development. I wished the plugin development would be easy like for the renderman language where only a few options needed to be added to the plugin code to enable new core features.

[vlado]

Vlado, do you think there is a chance to get a progressive render mode for the final beauty pass (CPU)?

This has been working for years now in the other V-Ray plugins, so it will come to V-Ray for Rhino too.

Impressive to see that redshift doesn't use buckets for the IM.

How is that impressive? Many other engines don't use buckets for their irradiance caches. However, the buckets help with distributed rendering.

I wished the plugin development would be easy like for the renderman language where only a few options needed to be added to the plugin code to enable new core features.

Some features need additional support both in the V-Ray core and the V-Ray integration, so it's not always as easy as flipping a switch.

Best regards,
Vlado