I'm so glad this feature will finally be implemented! Will save many headaches.
In its current form, can the coronaslicer only cap in one colour? For the icing on the cake, is there a way to set up multiple cap colours?
Currently when using the slice modifier, I simply create a 2 mat multi-subobject material to give the sliced part of an object a different colour. (Slice modifier + cap typically assigns mat id 2). This allows you to differentiate between sliced, nested objects and have the slice plane as an instanced modifier.
Attached is a crude example
You can also use it with Multimap in "instance" or "material id" mode - https://support.corona-renderer.com/hc/en-us/articles/4402649799441
Then the cap will have a different color depending on what object is capped.
Just tried with both options. Unless I'm doing something wrong, neither work. In the attached example, the inside tube is set to material id 3 for both tests. The multimap in 'material id' mode (left) never gets to the third colour (purple) plus there's an anomaly when the cutter doesn't fully pass through the object being sliced and switches to id 2. The inside tube should have purple caps, the outside should be red since its id 1.
Not sure how instance would work here in the case that we do not have instanced objects. Also, I have not tested objects that are assigned multi-subobject materials which we use often.