Hello there!
Thank you so much for the positive reviews and your genuine interest in the development of the project! For this specific game, I used pre-made textures from the "Terrain Sample Asset Pack" available on the Unity Asset Store, as they perfectly matched the aesthetic of the game plot. After sculpting the terrain with brushes using the Terrain Toolbox, here what I have done while texturing to avoid tiling effect:
In the "Paint Terrain" section, where you can assign layers(Layers-> Layer Palette), I added layer for grass textures. Next, I selected it in the layer palette, then accessed the Layer Properties to adjust the Tiling Settings, specifically the Size (X, Y). This adjustment changes the scale of the texture, making it bigger and borders less dense in viewport. For this project, changing the scale from the default of 1 to between 15 and 20 proved effective. And then simply started to paint the terrain with it.
For the finishing touches, I used a combination of different textures—such as grass, sand, and rock—to blend them in certain areas. This approach created a more varied terrain. By blending different textures, I was able to avoid a monotonous landscape that would have resulted from using just a single texture type, ensuring that close inspections by players would still reveal a detailed and cohesive environment.
I believe this was the tutorial I was watching during working on the terrain
I understand this might seem like a straightforward approach, but it made the job done, and I hope it can be of help to you as well!
P.S. If this method hadn't achieved the desired results, my next step would have simply been to search for alternative textures. It's as straightforward as that.