No Shadows 3D Photoshop [FIXED]

No Shadows in 3D Photoshop CC 2015?
Lighting doesn't work in 3D mode?
Photoshop keep crashing in 3D mode?
 

For the past 6 hours I have been struggling with the lack of shadows in my 3D models:

For reference my laptop is an MSI GT70.

My laptop has two graphic cards. The one inbuilt in the motherboard, and an Nvidia one.

Turns out the issue was that the graphics card was freaking out and wanting to switch over midway while photoshop was running (I'm guessing this is the issue. Not confirmed). This caused a crash. On why shadows didn't appear- I have no idea.

My solution was to change the Nvidia properties in the control panel as so:

By changing these settings my laptop now runs photoshop using the Nvidia GPU. This made shadows work.

Hope this helps somebody! I know it wasn't much a of a tutorial as it is extremely brief. But I'm hoping as soon as you read this and realise if this is your solution, you'd be tech savvy enough to know how to fix it yourself.

If it's not clear drop me a message at hi@markdt.design

Cheers.