Sticky Buckets

[rusteberg]

I have a scene with these topiary plants that started giving me trouble today - Rendered alone by isolating one of them and they render quickly, but when the whole scene renders buckets just stick to them in both the irradiance pass and render pass. The buckets eventually clear but there's A LOT of energy being wasted on them. Any thoughts on what could be happening here? The scene is setup to render IM/LC - I didn't have time today to see if they would tax BF the same way or not.....

[rusteberg]

the plant is all geometry, no clip maps and the leaf material is a basic vray 2 sided with a glossy fresnel base and no refraction.

[Richard7666]

I also have this issue quite a bit when rendering a plant using 2sided materials when viewed through glass, although typically my leafs are flat planes using opacity maps (no filtering, though Vlado said that's no longer an issue anyway IIRC)
Likewise haven't had time to do much testing though

[rusteberg]

Well, it might have something to do with the geometry of that plant..... I stripped the scene down, applied a default vray mat to everything and a default 2 sided to the plants then merged that into a fresh scene with default vray settings and it still hung with the plants in the scene. In the log window i notice these warnings that populate the log over and over again.... when the plants are deleted these warnings disappear

I guess my question is now what exactly are these warnings telling me about the geometry of that particular plant model?

[rusteberg]

Update: I tried unifying the normals then flip normal mode on the leafs and not only did that operation take a long time, it didn't seem to help.

Then I reopened the scene and deleted all but one of the plants and it rendered fine without the warnings shown above.

If I drag one as a copy and render it, it renders fine without warnings, but if i drag one as an instance these warnings populate the log again.....

[rusteberg]

Here's the stripped down scene if it's of any use:

http://wanderplay.com/stuff/Topiary-StrippedDown-1.zip

[rusteberg]

Update: I opened the original scene that lead me to post about this here and removed the instances of the plants and replaced them with copies - This rendered quickly and error free which is a huge weight off my shoulders..... It may be worth noting that the scene was initially assembled and rendered with a 3500X build and I don't recall it hanging like it did the other day when rendering it with the currently installed 36002 build

[anthonyh]

Not sure if you`ve seen it but there`s another thread in problems with what looks like the same error that vlado said should be fixed in 3.60.03.