Thanks guys!
For me it just comes down to trying different woods and seeing what they can look like. I could just put dye and finish on veneer sheets and pin them up for a check, but I like a more finished sample board to have around for reference.

Birdseye,
I have an Ortur 10W optical power unit (Laser Master 3). You can see the settings in the 4th photo down.
I use one pass if I want the piece cut, but still attached to the veneer sheet, two passes if I want the parts to fall free as with the cutting of the background.

I have a large assortment of veneers I have accumulated over the years, probably 95% is from the VeneerSupplies mystery boxes.
All veneer is the 1/40" stuff, but there is a fair amount of variability in that number. Some is thicker, some thinner.
The laser parameters are adjusted to compensate. The glue up with the shelf paper puts all the outward facing surface on the same plane, Any differences in thickness are compensated for with the glue between the veneer and plywood. The glue gets squeezed around to fill the gaps and any excess gets squeezed out along the sides if the panel is relatively small.

I've found that some wood species are just too delicate to be of much use for this kind of work.