Shadow Generations Shaders - DirectionBlend dpnndpn: Difference between revisions

Newer edit →

VisualWikitext

Revision as of 12:06, 25 August 2025

Return to shaders list

Overview

Shader Behavior Overview

Shader model:

[2] Standard (PBR)
Does not support:

An advanced PBR shader that uses

directional blending to interpolate between two texture sets
distance blending to blend a detail normal map into the first normal texture

Warning

This shader has a bug where the second normal texture is not applied. It is advised to not use this shader.

Related shaders

Behavior

Distance blending

Uses distance blending to interpolate

from the normal texture
to the normal and normal[1] textures blended together

for the normal map of the first set of textures.

The shader uses detailDistance and detailFadeRange from the stage RFL to determine the detail range.

Directional blending

This shader has two sets of PBR textures:

diffuse, specular and normal
diffuse[1], specular[1] and normal[2]

The shader uses a blend factor to interpolate from the first set of textures to second one.
This blend factor is calculated using directional blending.

This involves various inputs:


Input	Description
Normal map	The `normal` (afterdistance blending) texture is applied to the normal direction before calculating the directional blend factor
Red vertex color channel	The directional blend bias
`DirectionParam` parameter	The directional blend direction
`NormalBlendParam` parameter	The Directional blend intensity and offset
`diffuse` and `diffuse[1]` (multiplied together)	The Directional blend limit

Transparency

(For some reason) the directional blend factor is used for the transparency, and not any of the diffuse textures alpha channels, which makes for limited use cases.

Vertex Colors

The colors...
- Red channel is used as the directional blend bias
- Green and blue channels are unused
Alpha is unused

Material Inputs

Textures


Name	Index	UV Index	Kind	Red	Green	Blue	Alpha
`diffuse`	0	Any	Albedo	First Albedo color			directional blend limit
`diffuse`	1	Any	Albedo	Second Albedo color			directional blend limit
`specular`	0	Any	PRM	First Specular factor; Gets multiplied by 0.25	First Smoothness factor	First Metallic factor	First Ambient Occlusion
`specular`	1	Any	PRM	Second Specular factor; Gets multiplied by 0.25	Second Smoothness factor	Second Metallic factor	Second Ambient Occlusion
`normal`	0	Any	Normal map	First Normal map direction		N/A	N/A
`normal`	1	Any	Detail Normal map	Detail Normal map direction		N/A	N/A
`normal`	2	Any	Normal map	Second Normal map direction		N/A	N/A

Parameters


Name	X	Y	Z	W
`DetailFactor`	UV scale for the `normal[1]` texture	N/A	N/A	N/A
`DirectionParam`	Directional blend direction			N/A
`NormalBlendParam`	Directional blend intensity	Directional blend offset	N/A	N/A

Technical

For some reason using the IBL_CAPTURE debug view the directional blend factor is set to 0. Why this was done is unknown, and makes no sense.

Shader Features
`is_compute_instancing`
`is_use_tex_srt_anim`
`enable_alpha_threshold`
`is_use_gi_prt`
`is_use_gi_sg`
`is_use_gi`

@@ Line 5: / Line 5: @@
 | overview =
-An advanced [[Hedgehog_Engine_2_-_Physically_Based_Rendering_(PBR)|PBR]] shader that uses [[Texture Blending#Directional blending|directional blending]] to interpolate between two texture sets.
+An advanced [[Hedgehog_Engine_2_-_Physically_Based_Rendering_(PBR)|PBR]] shader that uses
+* [[Texture Blending#Directional blending|directional blending]] to interpolate between two texture sets
+* [[Texture Blending#Distance blending|distance blending]] to [[Texture Blending#Normal map blending|blend]] a detail [[Hedgehog Engine 2 - Textures#Normal map|normal map]] into the first normal texture
+{{notice
+|type=warn
+|content=This shader has a bug where the second normal texture is not applied.
+It is advised to not use this shader.
+}}
 | related shaders =