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

Power: 0.7 Softness: 0.2Projection using material formula and not using a decal component SpecularPower: 0.6 SpecularValue: 10

Colors

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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

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Shader Controls

Build up animation for the puddles via Dissolve Function

Blueprint Setup

Dissolve Param (0-1)

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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.

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Affect by DOF and Light FIX

Changing the shading to LIT

Go to LiquidBase

Change the ShadingModel to Default Lit

LightingMode to VolumetricNonDirectional

Plug the color into BaseColor rather than emissive. Do not include the EyeAdaptation function.

Light Intensity: 25 Lux

Light Intensity: 1 Lux

Light Intensity: 0 Lux

DOF

Still inside the LiquidBase (Master Material)

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.

ArtifactFade_Opacity = 1.0

ArtifactFade_Opacity = 0.0

5.5 New DBuffer Implementation

Go to Mannequin master material

Check Decal Response (DBuffer) to make sure it is Color, Normal, Roughness.

Feed DBuffer(BaseColor) with this formula

For Roughness

For Normal (1st)

For Normal(2nd)