I'm having some problems getting nice, dark ray-traced shadows. Even when I use a single infinite light, the shadows are not dark. Is it possibly because almost every single object has, as a default "light-emitter" on? Is there a convenient script for turning these off?

Even though you're allowed to use ray-traced shadows for infinite lights, they never work properly for me, but bear in mind I'm still mainly using Poser 7 so that may have been fixed later.

How about if you try a single point or spot light?

If you want to check if there are light emitters in your scene, turn off all the lights and render.  

Ray-traced shadows will be pitch black if you use the correct settings for lighting and materials. The "light emitter" property is only of relevance if you have "indirect light" on in the render settings.

For the light, the shadow will be black only if the "Shadow" parameter is set to 1 (which is highly recommended in any case for realistic renders).

For materials, the shadow will be not black if you have ambient (or translucence, maybe also alternate diffuse) in the material, i.e. anything that may be independent from direct lighting. As EnglishBob said, do a render without any lights on to see if some material glows.

Quote - Ray-traced shadows will be pitch black if you use the correct settings for lighting and materials. The "light emitter" property is only of relevance if you have "indirect light" on in the render settings.

For the light, the shadow will be black only if the "Shadow" parameter is set to 1 (which is highly recommended in any case for realistic renders).

For materials, the shadow will be not black if you have ambient (or translucence, maybe also alternate diffuse) in the material, i.e. anything that may be independent from direct lighting. As EnglishBob said, do a render without any lights on to see if some material glows.

These are shadows cast on the ground plain, with the check for "shadow catch only", so it must be the lights. This is my first render in PP2014, so I will remove the lights and create a new one. I'm pretty sure that the Shadow parameter is set to 1, but I will check.