Crafting with +1 +2 +3 items gives more SP!!!

[Haru]

No joke.. I'm getting about 25% more SP for using just +1 materials alone over +0.

Crimson Crayfish+0 ~ 392SP (result 6 wind shards)
Crimson Crayfish+0 ~ 400SP (result 6 wind shards)
Crimson Crayfish+0 ~ 398SP (result 6 wind shards)

Crimson Crayfish+1 ~ 528SP (result 6 wind shards)
Crimson Crayfish+1 ~ 495SP (result 6 wind shards)
Crimson Crayfish+1 ~ 478SP (result 6 wind shards)

Done using Alchemy 37. No support, no abilities, just plain standard synthesis.

[TheVedis]

This idea has been tossed around and let me just state its not true

the SP itself is random between a certain range, and after having done 10s of thousands of synths, with and withoiut HQ mats i can tell yuo right now, the quality you end up with has no bearing on SP gained.

your results are more likely in/out of fatigue.

im doing scale bugs right now

i get 450-550 for NQs
i get 450-550 for HQ1s
i get 450-550 for HQ2s
i get 450-550 for HQ3s

[Catapult]

Smelting ore down to metal has been a common activity for me across a range of metals, qualities and levels. I have observed no change in SP across +1/+2/+3, ever. And that is since beta.

This is indeed a complete myth.

What HQ materials DOES give you is extra starting durability and quality on your synthesis, boosting your chances on the result also being high quality.