Render Coffee, a new independent coffee shop, opened last month and there’s a nod to just about every current trend on the Boston coffee scene here. Owner Chris Dadey spent the last six years as general manager of Espresso Royale and Pavement Coffeehouse. His says the focus of Render Coffee is on quality and experience, even if it slows the line. For each $4 drip coffee, the barista carefully weighs Counter Culture grounds (“21.9 grams’’) and puts them into an unbleached paper filter that sits snug in a heated Kalita ceramic cone. Then he drizzles in 200 degree water from an odd-shaped aluminum decanter, consulting flow-rate cheat-sheets as he switches the pouring rate from “bloom’’ (slower) to “flow’’ (faster). The coffee drips into laboratory glassware, from which it’s poured into your cup. The whole process takes place on a digital scale that serves as weight-check and dramatic stage.