Naming and standards¶

The same rules in every master, so every Material Instance reads the same way. Follow them for your own content.

Asset names¶

Format: Prefix_Asset_Name_01a (+ _Suffix for textures). 01 = asset or set number, a = variant or part of the same set (same textures). Example set: SM_Asset_Name_01a, T_Asset_Name_01a_BC, T_Asset_Name_01a_NNMR, MI_Asset_Name_01a.

Prefix	Asset
`SM_`	Static mesh
`SK_`	Skeletal mesh
`T_`	Texture
`MM_`	Master material (do not edit)
`M_`	Material (stand-alone, not a master)
`MI_`	Material instance
`MF_`	Material function
`ML_`, `MLB_`	Material layer, layer blend
`MPC_`	Material parameter collection
`RVT_`	Runtime virtual texture
`BP_`	Blueprint actor
`NS_`	Niagara system
`UCX_`	Collision mesh in the DCC: `UCX_SM_Asset_Name_01a_00`, `_01` …

Nanite and non-Nanite versions of one mesh: SM_Asset_Name_NN_01a = Nanite.
One word per name part, words joined by _, no spaces or Cyrillic.

Meshes for the masters¶

Mesh data	Used by
UV0	All texture slots
UV1	MaskBlend Blend Mask (baked layer masks); lightmap UV if you use baked lighting
Vertex color	VtxBlend layers / puddles / dry areas, foliage wind (Vertex color)
Pivot	Floor: bottom-center; against a wall: bottom-back; wall: center-back; ceiling: top

Texture suffixes and import¶

Suffix	Content (R / G / B / A)	Compression	sRGB
`_BC`	Color / – (no alpha = BC1)	Default	On
`_BCA`	Color / Opacity (foliage, decals)	BC7	On
`_NNMR`	Normal X / Normal Y / Metallic / Roughness	BC7	Off
`_NNOR`	Normal X / Normal Y / AO / Roughness (foliage)	BC7	Off
`_M`	Masks / AO	Masks	Off
`_H`	Height / Edge Shape (optional)	BC7, never VT	Off

Blend Mask for MaskBlend: R / G / B = layers, Masks, sRGB off.
Tools/KurinFixTextureSettings.py applies these settings to the selected textures by suffix.

Parameter groups¶

Group	What goes there
`00 Settings`	Global switches. Always on top
`01`, `02`, `03` …	Core groups: `01 Textures`, `02 Base Color`, `03 Surface`, or one group per layer
`<group> (VT)`	Virtual Texture slots, right under their group
Named, no number	Add-ons, A–Z: `Cover`, `Dust`, `Emissive`, `Weather` …

Parameter names¶

Use <Feature>? = on/off switch, first in its group.
Ends with Map = texture. Ends with (VT) = Virtual Texture slot.
Flatten: 0 = texture, 1 = one flat value.
Layer prefix: Base -, R -, G -, B -; landscape L1 - … L4 -.

Vertex color¶

Channel	VtxBlend / MaskBlend	Foliage
R	Layer R (VtxBlend)	Main bend weight (0 root, 1 top)
G	Layer G (VtxBlend)	Branch sway
B	Painted puddles / wet spots	Leaf flutter
A	Dry Mask (`Use Dry Mask (VC A)?`): fill 1, paint 0 = dry	Branch phase (random per branch)

Custom Primitive Data¶

Index	Used for
0	Actor Dry (Weather)
1	Actor Rain Shelter (Weather)
2–7	Reserved by Kurin, keep free

Use index 8 and up for your own per-actor data.