SexLab P+ Documentation

Documentation for SexLab Patch Plus, SexLab Scene Builder, and related mods

SLAL vs SLSB

A detailed comparison between the legacy SLAL system and the new SLSB format.

Overview

Aspect SLAL SLSB
Full Name SexLab Animation Loader SexLab Scene Builder
Source Format Papyrus scripts (.psc) JSON files (.json)
Compiled Format Papyrus bytecode (.pex) SexLab Registry (.slr)
Registration Runtime via MCM Automatic at startup
Speed Slow (Papyrus-based) Near-instant (native)
Animation Limit 1000 human + 1000 creature Unlimited
User Action Required Yes (MCM clicks) No
Save Dependency Per-save registration Save-agnostic

Registration Process

SLAL Registration

Game Start
    ↓
SLAL Initializes (wait)
    ↓
Open MCM → SLAL
    ↓
Select Animation Pack
    ↓
Click "Enable All"
    ↓
Click "Register Animations"
    ↓
Wait for Papyrus to process each animation
    ↓
Repeat for each pack
    ↓
Repeat for each new save

Time: Minutes per pack, depending on animation count.

SLSB Registration

Game Start
    ↓
SexLab P+ loads .slr (SexLab Registry) files
    ↓
Done!

Time: Near-instant, regardless of animation count.

Key Differences

1. Animation Limits

System Human Creature Total
SLAL 1000 1000 2000
SLSB ∞ ∞ ∞

Note: Legacy mods using sslBaseAnimation are still limited to 1000 per type.

2. Performance

Operation SLAL SLSB
Registration Papyrus (slow) Native (fast)
Animation Search Papyrus (slow) Native (fast)
Scene Startup Script overhead Minimal overhead

3. User Experience

Aspect SLAL SLSB
Initial Setup Click through MCM None
New Save Re-register everything Just works
Adding Packs Register manually Restart game
Removing Packs Clean save recommended Remove and restart

Migration Path

For Users

  1. Keep your SLAL packs installed (for meshes/assets)
  2. Install SLSB conversion patches on top
  3. The conversions contain the SLR files that P+ reads
  4. Don’t install the SLAL loader itself

For Pack Authors

  1. Use the SLSB conversion tool to convert existing packs
  2. Or create new packs directly in SLSB format
  3. See Converting Animations for details

Compatibility

What Works

  • Most mods that start scenes work fine
  • Animation tags are preserved
  • Event hooks work (scene start, end, stage change)
  • Animation filtering by tag

What Needs Attention

  • Mods that register animations via Papyrus need patching
  • Voice packs need P+ compatible versions
  • Mods checking for specific SLAL functions

Frequently Asked Questions

Can I use SLAL packs with P+?

Yes, but you need SLSB conversion patches. The SLAL pack provides meshes, the SLSB conversion provides registration data.

Do I need the SLAL loader?

No. In fact, don’t install it with P+.

Will my favorite pack get converted?

Most popular packs already have conversions. Check Animation Packs or the Discord.

Can I convert packs myself?

Yes! See Converting Animations for instructions.