Scope of this mod

While other mods such as torches cast shadows, and dynamic torch shadow have a broader scope - editing ALL torches, this mod has one function:
To make a player craftable, shadow casting torch, separate from the default flat light casting torch. Only you, the player, should have this torch.
It does not alter any vanilla lights, there is a single script, and the torch is perfectly discernable from the vanilla torch. It does not alter any vanilla records.

Obtaining the torch

Obtain or add by console: 1 firewood, and 1 ruins linen.
The linen can be found in any draugr tomb including bleak falls barrow.
You can harvest firewood at any firewood stump. There is one in Riverwood though you'll need to pick up a wood cutter's axe somewhere. (there's usually one nearby).
Go to any forge and craft the shadow torch.

console commands for the ingredients
player.additem 0006f993 1
player.additem 00034cd6 1

Compatibility

I primarily made this mod for VR, but since it creates new records, it should be compatible with any version of Skyrim. Though if you have SSE, there's no reason to not use an ENB with particle lights for this purpose.

All mods affecting torches, will apply correctly EXCEPT to the torch that this mod provides, as the shadow torch is a separate entity that I added in creation kit. 
I am open to hosting patches here if anyone wants to make them for such mods, but will not support them.

This torch is not holsterable with VRIK at least in torch slots. I don't have access to the source code for VRIK, but I'm guessing it's checking for a specific form ID to holster torches rather than checking if "torch" exists in the name. 
I'd love for this to be integrated if possible. Notice me proggy. Otherwise, the torch shows up in your hand just fine and is compatible with VRIK. 

compatible with spellwheel vr and weaponthrow. 
Though with weaponthrow, the torch seems to disappear wherever it hits, only returning if you have auto-return enabled. If someone knows a way around this, I'd love to hear it.

This mod is likely going to have issues with large lighting overhauls that drastically change how many shadowcasting lights are in a cell. You'll be able to tell because the torch will be lit, but not emitting light. This is the flicker issue due to the engine's 4 shadowcast light limit described below. Carry a vanilla torch with you for when this goes out to supplement it, there's not much else you can do in such areas of the game. 

Known issues

Skyrim has a hardcoded, 4 shadowcast light limit, engine enforced. Exceeding that limit may cause flicker.

To avoid this:
I wouldn't give out these torches to followers. 
I also would take caution wielding one while having equipped spell with a spells cast shadows mod. That would bring you to personally having 2 shadowcasting lights and would increase the number of potential flicker areas. 

From the Torches Cast Shadows page, This also applies: 

Light cast on characters skin might sometimes look strange or "polygonal" due to default shadow bias values. Not possible to change on dynamically generated references.

This will affect the appearance of polygons of the VRIK body and NPC skin under close light from the torch that this mod allows you to create.
It's not possible to fix from what I understand, but if you know of a fix, let me know.