Documentation

Blood Pack Documentation Guide

Materials

Master Materials

M_LiquidBase Master material for particle-based effects

M_LiquidDecal_Dynamic Deferred decal but with dissolving animation functionality.

M_LiquidDecalBase Basic deferred decal-based material

Texture Samplers

The material requires 3 main maps in order to mimic a liquid-like shine

Alpha Mask Map - This is the primary source of the color modifiers, dissolve, and opacity.

Normal Map and ReflectionTexture - By sampling these two textures you mimic a fake specular behavior.

Modifiers

NormalStrength - Normal map intensity control Power - Alpha Mask exponent control used for lerping two colors Softness - Edge Softness

SpecularPower - Fake specular exponent control SpecularValue - Fake specular intensity multiplier

Niagara Effects

Stab

The Particle Effect should be towards the direction of the stab.

Slash

Bullet Hit

Splash/Burst

Splatters

Particle Decal Renderer (NEW)

- Can disable projection to Meshes using ReceiveDecals boolean. - Uses Deferred Decal rendering. Supports PBR.

- Reacts to lighting condition (LIT)

Shader Based Projection (Legacy)

- ReceiveDecals boolean wont work. - Uses Translucent Rendering (Non PBR). - A cheaper alternative if you don’t mind lighting conditions

- UNLIT

- Automatically rotate based on the normal of the collision. - Exposed Param that you can modify to create desired splatter behavior. LifetimeMultiplier ScaleMultiplier SpawnCount VelocityMultiplier

Artery/Dripping

Shader Controls

Build up animation for the puddles via Dissolve Function

Demos

Use Case - Blood Linger and Accumulation

Attach NS_Dripping_Dynamic to desired bone/socket location. The emitter has a collision event that spawns splashes and splatters.

Combine it with a decal component for an accumulation effect.

Use a curve to modify the timing in order to match blood-dripping behavior. Then use the value to drive the Dissolve parameter

You can check more demos by going to this map. Showroom_Dark_Demo_01. While on this map, just simply play the Level Sequence.

Affect by DOF and Light FIX

Changing the shading to LIT

Light Intensity: 25 Lux

Light Intensity: 1 Lux

Light Intensity: 0 Lux

DOF

On the left side details panel. Find TranslucencyPass and Change to eforeDOF.

Reducing Steep Angle Artifacts (UE 5.5 Deprecated)

Decal material instances derived from master materials such as M_LiquidDecalBase and M_LiquidDecal_Puddle have control to lessen the decal projections artifacts.