
You can go ahead and download blender here.
https://www.blender.org/download/
Use a color ramp as a mask to separate mountains from the ground and drive displacement, then mix the mountain texture with the ground to create snow-capped mountains.
Switch the world sky to blue to create blue reflections on the mountains, render with F12, and adjust the deicing scale under the modifier for subsurface scattering to add detail.
Build a clouds material in blender with a noise texture, mapped via texture coordinates, adjust scale and detail, and use a color ramp to blend small and larger clouds.
Explore building varied sky clouds in Blender by duplicating cloud layers, varying their scale, and blending small and large clouds with color nodes to achieve a blue, cloud-filled sky.
Use a color ramp as a mask to create a horizon-like control over where clouds appear in Blender, feeding clouds to the top and bottom with a mix factor.
Apply the same shader approach to the world environment instead of a dome, enable world nodes, connect output to the background color, and adjust horizon and color map to control sky.
Create dynamic, wind-blown grass in Blender using a simple two-plane setup and a particle system, enabling realistic motion with minimal modeling.
Explains how to create realistic grass in Blender with a hair particle system and dynamic physics, tuning particle properties, stiffness, damping, vertex mass, and clumping and noise for natural variation.
Create realistic grass in Blender by building a node-based material with the shader editor, using noise texture, mapping, and a color ramp for green and yellow variation.
Create variation in the grass by adding longer, straw-colored blades (grass sparks) via a copied particle system, adjust emission density, and enable wind-driven hair dynamics with reduced damping.
Learn rendering in Blender by previewing renders, adjusting sun and point lights, and applying color and materials; configure output properties and render animations with the ocean modifier for water effects.
In this class, you're going to learn the basics of creating some natural parts of worlds. It's not everything you need to create a world, that would be way too long but it's a great start. You'll be using Blender, the completely free and open-source program. I know World Generation sounds intimidating but I promise you this class starts from the beginning if your just getting started. If you're not, just skip the interface lesson and jump straight to the good stuff.
What's even more amazing is that this class will require almost no slow modeling. That's what I call it when you manually move vertices around. You'll be using Blender's built-in capabilities to generate unique models, scenes, and animations.
You're going to first learn how to create rocky terrain by learning how to create a snowy mountain range.
The second thing you're going to learn is how to create a cloud backdrop from scratch. You'll never have to download a background if you don't want to with this technique. You'll be able to light your scenes and create realistic surroundings with this skill. It's perfect if you've just learned how to create something like a mountain range, hint hint.
Mountains and clouds aren't the only things in worlds though, next you'll learn how to create grass, and this time you'll also learn how to animate it by making it blow in the wind.