Summer sale time, 30% off on all products on both Gumroad and Artstation, prices has already been changed on Artstation but on Gumroad you have to use the code summer at checkout.
As a bonus I will give away Japanese street refs Vol.2 to anyone that spends more than $10 on either Artstation or Gumroad when it is released in about 3 weeks, just send me a mail with your receipt. note that even if you buy the products on Artstation you will get the free product on Gumroad.
Go to the sale in the links below
Artstation Store - https://jrotools.com/store
Gumroad Store - https://gumroad.com/environmentdesign