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As shown in the image above;

• Create a cube. Select one poly face and under the Polygon tools tab, select Sketch Extrude and drag out from the blue dot for the required length, making multiple, even stops along the way.
• (Alternatively, simply drag out a cube that is say, 1x1x10)
• In poly-mode, double-click on the item to select all polygons.
• Under the Polygon tab, click on the Spikey tool, then click on the object. Each face will be sub-divided into 4 tris.
• Whilst still selected, click on Bevel (B) (make sure Group Polygons is unchecked), and then drag the red-handle in slightly.
• Press backspace or Delete to remove the inside polygons.
• That's it!
• If you want to add some thickness, whilst still selected, click on the Thicken tool and drag slightly.

• Place the grass into a Group
• Create a replicator using the Grass group as Prototype and the ground item as the Point Source.
• Hide the grass from the renderer by unchecking it under the Group tab

Apply texture

• Select your mesh, apply a material.
• With the material selected> Add Layer > Image Map > Load Image of your grass, dirt or other preferred texture.

Correct Gamma

• Under > Properties > Texture Layers > Gamma, divide the gamma 1.0 by 2.2 = .4546


Increase Wrap

• Under > Properties > Texture Locator > Projection, increase both Horizontal & Vertical Wraps so that they appear tiled. Try 10 x 10 (but it really depends on the texture you are using)
• Note: Make sure you have the Render Preview Window open, as texture replicators do not show up in the Open GL viewport.

Texture Replicator

• Under > Properties > Texture Locator > Texture Replicator > Particle Source, select the mesh item you wish to apply the image map to.
• Increase the Particle Size so that each image is almost touching
• Adjust the Falloff Bias and Gain so that the mess is totally and evenly covered.
• Adjust the Random Size, Rotation and Random Rotation as required.

Apply texture

• Select your mesh, apply a material.
• With the material selected> Add Layer > Image Map > Load Image and bring in several different images. I'm using grass, rocks and sand.

Correct Gamma

• Selecting all the texture images at one, under > Properties > Texture Layers > Gamma, divide the gamma 1.0 by 2.2 = .4546


Increase Wrap

• Under > Properties > Texture Locator > Projection, increase both Horizontal & Vertical Wraps so that they appear tiled. Try 10 x 10 (but it really depends on the texture you are using)

Create Group of textures

• From the Shader Tree, select all the texture map images you want to use in your 'texture bomb'

• Go to the > Group tab > New Group, name your group and leave it as Standard


 Replace current image with the Group

• Under > Properties > Texture Layers > Image, change it to the Group you just created

Note: Make sure you have the Render Preview Window open, as texture replicators do not show up in the Open GL viewport.

Texture Replicator

• Under > Properties > Texture Locator > Texture Replicator > Particle Source, select the mesh item you wish to apply the image map to.
• Increase the Particle Size so that each image is almost touching
• Adjust the Falloff Bias and Gain so that the mess is totally and evenly covered.
• Adjust the Random Size, Rotation and Random Rotation as required.

And this is a quick and dirty random terrain texture created with the three images at the top of the page.

• Create a flat plane 3 x 3
• Create a new UV map using Barycentric projection  UV > UV Projection Tool > Barycentric 
• Switch to the Paint tab
• Create a blank texture  > Texture > Add blank colour texture 
• Start painting your design. No matter what pattern you create it will be tillable!
• Remember to save your image out > File > Save Image