I'm a longtime user of Terragen, with over 15 years of experience ranging from Terragen Classic to Terragen 4.  I'm passionate about 3D landscape creation and excited to share what I learn.  Over the past few years, I've created the TerraTuts YouTube channel with over 50 short Terragen tutorials and thousands of viewers.  Now I'm creating TerraTuts Pro on Udemy to fill your need for more in-depth tutorials and courses to take your Terragen skills to the next level.