Rendering Techniques in Gears of War 2 - Unreal Engine

Example: Surface-space
Surface space
• Inside the Riftworm, characters use a blood shader
• One scalar shader parameter (0-1) to indicate amount of blood
• Texture masks for bloody regions and pattern
• Scroll textures downwards in texture-space
– Gradient pattern & normalmap
– (Roughly correlates to down in world-space)
• Masks and shader parameter multiply
– UUsed d as llerp ffactor t bbetween t a constant t t blood bl d color l and d un-bloodied bl di d color l
• Blood color have negative Blue and Green components
– Produces slight discoloration in the transition areas
• ALL_SoldierShaders.SinglePlayer.Bloody.SoldierShader_Bloody