Renderable curves are all hidden or visible with some keyed visibilities

[colorbleed]

Problem
Whenever multiple curves are in a V-ray renderable curves set and the visibilities of them are keyed (either on transforms, parent transforms or the shapes) they are not considered correctly per curve. When more than half of the curves are visible ALL will be rendered and when less than half are visible NONE of the curves will be rendered. See attached curves scene. On frame 2 there are three visible curves and they render fine, on frame 1 there's only one visible curve (the rest are keyed to have their visibility off) and when rendering this frame NO curves will be present in the render.

It seems that the visibilities are combined to an average that sets the visibility of the renderable curve set, whereas it would make more sense to keep the renderable curves result visible but ignore the hidden curves.

To reproduce
1. Make three curves.
2. Put them in a renderable curve set.
3. Key the visibility to off for two of the curves.
4. Render.
5. Problem: All curves will be hidden in the render.

Version:

V-Ray for Maya version 3.40.06 from Nov  3 2016, 17:54:09
V-Ray core version is 3.25.01

[colorbleed]

A minor addition of information to this problem:

Multiple renderable curves set
The problem remains if you would put the curves into separate renderable curves sets BUT they still share the same material. Once you have separated them in sets that each have their own material you can work around this particular bug. (Which likely is not a suitable solution for many use cases.)

[yolov]

Confirmed, looks like a bug.
Thanks for the scene. I've reported this to the developers and I'll let you know when there's a fix.

[yolov]

The fix has been in the nightlies for some time now, I just forgot to update the thread on time. The builds from April 12 and later should work fine. This will go into stable for the next major version, though.