Low Poly Hay Bails

A behind the scenes look at the low poly hay bails used in the Medieval – Starter Kit Update 2.0. This hay bail is only 156 Tris but gives a nice effect when used in your scenes. The texture doesn’t need to be large dimensions as this is going to be a small asset, however multiple copies of the same asset will potentially be used. Unity 3D will use batching to optimise this for us automatically. Reusing materials in a Unity 3D scene will optimise your batching and is encouraged.

The hay bays are a simple cylinder shape that have been subdivided into half initially. The edge loop that cuts the half bail through the centre has been shrunk down so that it looks like it’s been squeezed together in the middle.

Then, the two edge loops on either side of the hay bail are selected and extruded out for the fringe look. This is where the hay will look like it’s coming out the sides of the bail.

Some simple seams are created on the edge loops and finally unwrapped. The hay bail texture itself is a simple hay created using photoshop grass brush with a randomisation on the colour tone range between an orange and yellow colour. The fringe is created using the same technique.

Hay Bail UV Mapping
Hay Bail UV Mapping

When the model has the texture applied, just check that the normal faces are facing the correct way prior to exporting the hay bail. As you can see the normals are all facing outwards.

Hay Bails Low Poly
Hay Bails Low Poly

When exporting the hay bail, include the hay bail texture. Here I’ve used Unity 3D to import the mesh and material with the texture assigned. I’ve also used a 2 way shader with an alpha channel so that the fringes are visible. Adding some warm lighting and shadows will finish the effect off nicely.

Hay Bails
Hay Bails

This low poly hay bail is included in the Medieval РStarter Kit Update 2.0 available on the Unity Asset Store.

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Michael Cowley

Job: Software Developer (C#, JavaScript) Hobbies: Games Development (Unity 3D, Blender 3D and Photoshop) Assets: http://u3d.as/mYx Game: @geekgarageuk

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