IES lights is your solution for shadows
Here is a set you can use with a preview: http://www.mrcad.com/download-free-ies-lights/
Simple add the image file to the distribution node.
To see what it does create a single side plane in Poser. make it diffuse and make it an emitter.
Now set the efficiency to 1 and add the image file to the distributon node. Set gamma to 1
Then render it.
If you chose a spotlight type file, you can see a light on the floor with nice shadows.
This setup can be controlled in the following way:
- increase the plane to create softer shadows or make it smaller to have sharper shadows
- Change the scale of the distribution map to increase the lit area or to make it smaller
- change the rotation of the distribution map to point it in a different direction.
Try this out with a single plane and the ground and see how it works. It is pretty simple, but you have to do it once in a simple scene to get a feel for it
refract is the index in glossy and specular materials
Play with specularity and roughness to get the reflection you need: Spec to 1 = complete reflection, roughness means how accurate the reflection is - 0 = mirror
Configuration: Windows 10 64bit Creators Edition, I7 6850K, 128GB, 2 GeForce 1080ti, P11 Pro SR6