Terraformer Expedition to Mars Update 3/28/15

-** This update is mostly a graphics update **

• We've added quad trees for more detailed terrain.

• We've improved performance by improving the polygon and vertex filters

• We've changed the lighting/shading model, fixing shading issues while under ground

• We've changed the bump mapping, bump mapping is now implemented correctly when underground.

• We've fixed edge blending,

  • There were cases when hard edges were used when a smooth edge would be desirable.
  • There were cases when blends were not depth biased correctly.

• Added new distance fading

• Added a new adaptive vertex distance filter

• Fixed world wrapping normal vector issue(s).

• Fixed jump bug

• Added number of iron veins left to melt/remove, in order to get core rotating, to the planet magnetic field achievement.