# Documentation **Blood Pack Documentation Guide**
## Materials ### Master Materials


	M_LiquidBase Master material for particle-based effects	0.png
	M_LiquidDecal_Dynamic Deferred decal but with dissolving animation functionality.	1.png
	M_LiquidDecalBase Basic deferred decal-based material	2.png

### 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](https://2172137675-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FIDY48Kh4vjaW2sp9MS3a%2Fuploads%2F22gv9cm9TB1vybFVg3Rd%2F5.png?alt=media)

![](https://2172137675-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FIDY48Kh4vjaW2sp9MS3a%2Fuploads%2FwarpO9USBPC35JNxBYkN%2F7.png?alt=media) *** ## Niagara Effects ### Stab

![](https://2172137675-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FIDY48Kh4vjaW2sp9MS3a%2Fuploads%2Fb4h2mMyYd7eOcEDM0mma%2F9.png?alt=media)\ The Particle Effect should be towards the direction of the stab. ### Slash ![](https://2172137675-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FIDY48Kh4vjaW2sp9MS3a%2Fuploads%2FGVRz2MaNx13nNRcDuKDN%2F10.png?alt=media) ### Bullet Hit ![](https://2172137675-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FIDY48Kh4vjaW2sp9MS3a%2Fuploads%2FXCXXdKaYRtyOr96GekcV%2F11.png?alt=media) ### Splash/Burst ![](https://2172137675-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FIDY48Kh4vjaW2sp9MS3a%2Fuploads%2FQKvCdwN6Qp6ehDcsrKtG%2F12.png?alt=media) ### Splatters #### Particle Decal Renderer (NEW) \- Can disable projection to Meshes using *ReceiveDecals* boolean.\ \- Uses Deferred Decal rendering. Supports PBR. \- Reacts to lighting condition (LIT) ![](https://2172137675-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FIDY48Kh4vjaW2sp9MS3a%2Fuploads%2FEbgb2Z9yKqtIMRt9VRzR%2F13.png?alt=media)

#### Shader Based Projection (Legacy) \- *ReceiveDecals* boolean wont work.\ \- Uses Translucent Rendering (Non PBR).\ \- A cheaper alternative if you don’t mind lighting conditions \- UNLIT ![](https://2172137675-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FIDY48Kh4vjaW2sp9MS3a%2Fuploads%2FQBWAFVLwuNQquYLTpUnY%2F15.png?alt=media) ![](https://2172137675-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FIDY48Kh4vjaW2sp9MS3a%2Fuploads%2FSkKYH9AFCP6O5qI4CQ8K%2F16.png?alt=media) ![](https://2172137675-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FIDY48Kh4vjaW2sp9MS3a%2Fuploads%2FGg2k5xKWWzEeOEVDXgFf%2F17.png?alt=media) \ \- Automatically rotate based on the normal of the collision.\ \- Exposed Param that you can modify to create desired splatter behavior.\ \&#xNAN;*LifetimeMultiplier*\ \&#xNAN;*ScaleMultiplier*\ \&#xNAN;*SpawnCount*\ \&#xNAN;*VelocityMultiplier* ### Artery/Dripping ### ![](https://2172137675-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FIDY48Kh4vjaW2sp9MS3a%2Fuploads%2FoEQvWArd6CachmNcJuHS%2F18.png?alt=media) *** ## Shader Controls

Build up animation for the puddles via Dissolve Function

*** ## Demos ### Use Case - Blood Linger and Accumulation


	image40.png
	image39.png

{% hint style="info" %} Attach *NS\_Dripping\_Dynamic* to desired bone/socket location.\ The emitter has a collision event that spawns splashes and splatters. {% endhint %}

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 {% hint style="info" %} You can check more demos by going to this map. **Showroom\_Dark\_Demo\_01**.\ While on this map, just simply play the Level Sequence. {% endhint %}


	image20.png
	image22.png

*** ## Affect by DOF and Light FIX ### Changing the shading to LIT

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	image34.png
Light Intensity: 1 Lux	image35.png
Light Intensity: 0 Lux	image9.png

### DOF

Still inside the LiquidBase (Master Material)

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


	image24.png
	image27.png

## 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.

## 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)