Hey, We currently use Maya/Vray and a Houdini/Mantra rendering pipeline and we have tools to export vray lights from maya>houdini and shader conversion tool. One thing I have noticed is that Houdini’s PBR and micropolygon PBR renderer is extremely fast at heavily motion blurred scenes with the same…

Vray does really really accurate motion blur on displaced surfaces as they’ve aimed for quality first, the only problem with this is as you say it’s a bit slower than a faked version and it’s also quite memory intensive. Vlado’s mentioned that they’re working on it at the minute, some people had men…

That’s great news! any idea when we’ll see this feature in nightly?

Well this topic can get big :slight_smile: R_Cyph, what you are talking about is something like mental ray’s rapid rasterizer blur where it samples everything once then blurs the result. But I could never get good clean image with reasonable render times in it (in mental ray). If you don’t raytrace …

As far as I know it’s at the theory point right now. There’s other things that benefit similarly like having options to calculate light cache from the non displaced mesh so Vlado is thinking about it.

It is faster for the same reason that PRMan is faster at motion blur: a) micropolygons are projected on the screen directly rather than found by raytracing, and b) shading is static and typically computed without motion blur. We do not plan to do any of that for V-Ray; our goal is to keep it as a …

Ah so PRman isn’t actually sampling lighting for the polygons in the space that they’d move into with proper motion blur? In other words the shading is spatially inaccurate for something like a fast moving object going through a tunnel with overhead strip lighting?

[image] V-Ray and Maya 2013 Ah so PRman isn’t actually sampling lighting for the polygons in the space that they’d move into with proper motion blur? As far as I’m aware, it doesn’t (by default, at any rate). The micropolygons are shaded at one specific moment of time, with everything assumed …

@Vlado Well, maybe you can turn on pure raytrace mode in 3delight to fix that( hider set to raytrace), but what’s the point doing that? LOL. ( good for some benchmark purpose )

The raytrace hider didn’t change anything and I didn’t expect it to - the hider is just for camera rays; it has no effect on the actual shading. Micropolygons are still shaded in exactly the same way. If there’s an option for this in 3delight, it’s something else. Below is the image… Best regards, …

Vray MB vs Houdini mantra pbr MB

V-Ray V-Ray for Maya General

Narann June 13, 2013, 9:52am 15

Tell me if I’m wrong but if you have “PBR” (full raytraced) and “Micropolygon PBR”. Did you tried with “Micropolygon PBR”?

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Vray MB vs Houdini mantra pbr MB

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