Scene not rendering objects - just illuminated empty space

[gbambo]

So on two occassions in the last 72 hours, I have had scenes that refused to render objects. I have confirmed that I am not running out of memory and have not violated the 32 texture limit.

One of the scenes is of a single tree. I get a light, bluish square because my Sun is illuminating the otherwise empty scene successfully. I can see the object in the editing viewport. But it does not render, even though it is definitely not hidden. Nor is it specular with refraction = 1.

The render viewport is is set to the edit viewport I can see the object in. I cannot see it in the OctaneRender viewport either (although a view of the tree from a different angle flashes for a second before rendering starts in the OctaneRender viewport (is this a cached view of a prior framebuffer? I don't even remember render this object before).

There is no camera. The second scene is a complex archviz interior rendering from a camera. There is light via portals and rendering was working recently. All other statements about scene 1 appear true of this scene as well.

I have never seen anything like this before and am quite confused. What other reasons are there for an object that displays in the viewport not rendering?

[gbambo]

So it turns out that the materials did not convert properly. They show in the material editor, but simply do not render. I find this surprising and think that this constitutes an error. In similar circumstances MR throw errors, so the user know something is awry. No errors were thrown at any stage, import or render. Textures were confirmed as being in the user paths.

I finally got it to render by applying material from the online database. Not pretty, but at least it renders.

The original material was a five part material that mapped separately to individual subcomponents of the tree.

Curiously, other plant species (previously hidden) render with a generic gray material, reflecting a different, but less serious/confusing, material conversion failure.

[Karba]

So it turns out that the materials did not convert properly. They show in the material editor, but simply do not render. I find this surprising and think that this constitutes an error. In similar circumstances MR throw errors, so the user know something is awry. No errors were thrown at any stage, import or render. Textures were confirmed as being in the user paths.

I finally got it to render by applying material from the online database. Not pretty, but at least it renders.

The original material was a five part material that mapped separately to individual subcomponents of the tree.

Curiously, other plant species (previously hidden) render with a generic gray material, reflecting a different, but less serious/confusing, material conversion failure.

Can I have your scene? [email protected]