Justin113D: Added page

2025-08-25T14:03:52Z

Added page

New page

{{Shader Documentation
| game = Shadow Generations
| shader name = DirectionBlend_dpndpnn
| sbo = model=2, no_noise, no_transparent_layer

| 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
* [[Texture Blending#Normal map blending|blends]] an extra [[Hedgehog Engine 2 - Textures#Normal map|normal map]] textures into the other normal maps.

This shader is essentially a modification of the {{ShaderLink|Shadow Generations|DirectionBlend_dpndpn}} shader.

| related shaders =
Blend_dpnbdpn,
Blend_dpndpn,
BlendDetail_dndnd,
BlendDetail_dpndpnn,
Detail_dpndpn,
Detail_dpnn,
DirectionBlend_dpndpn,
DirectionBlend_dpnndpn,
DistanceBlend_dpn

| behavior =

=== Extra Normal Map ===
The <code>normal[2]</code> texture is [[Texture Blending#Normal map blending|blended]] into the <code>normal</code> and <code>normal[1]</code> textures before their usage.

=== Directional blending ===

This shader has two sets of PBR textures:
* <code>diffuse</code>, <code>specular</code> and <code>normal</code>
* <code>diffuse[1]</code>, <code>specular[1]</code> and <code>normal[1]</code>

The shader uses a blend factor to [[Texture Blending#Interpolation|interpolate]] from the first set of textures to second one.
 This blend factor is calculated using [[Texture Blending#Directional blending|directional blending]].

This involves various inputs:

{{{!}} class="wikitable"
{{!}}+
! Input
! Description
{{!}}-
{{!}} Normal map
{{!}} The <code>normal</code> texture is applied to the normal direction before calculating the directional blend factor
{{!}}-
{{!}} Red vertex color channel
{{!}} The [[Texture Blending#Variables|directional blend bias]]
{{!}}-
{{!}} <code>DirectionParam</code> parameter
{{!}} The [[Texture Blending#Directional blending|directional blend direction]]
{{!}}-
{{!}} <code>NormalBlendParam</code> parameter
{{!}} The [[Texture Blending#Directional blending|Directional blend intensity and offset]]
{{!}}-
{{!}} <code>diffuse</code> and <code>diffuse[1]</code> (multiplied together)
{{!}} The [[Texture Blending#Directional blending|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 [[Texture Blending#Variables|directional blend bias]]
** Green and blue channels are unused
* Alpha is unused

| textures =
diffuse,0,Any,
[[Hedgehog Engine 2 - Textures#Albedo|Albedo]],
First [[Hedgehog_Engine_2_-_Physically_Based_Rendering_(PBR)#Albedo|Albedo]] color__,
[[Texture Blending#Variables|directional blend limit]];

diffuse,1,Any,
[[Hedgehog Engine 2 - Textures#Albedo|Albedo]],
Second [[Hedgehog_Engine_2_-_Physically_Based_Rendering_(PBR)#Albedo|Albedo]] color__,
[[Texture Blending#Variables|directional blend limit]];

specular,0,Any,
[[Hedgehog Engine 2 - Textures#PRM|PRM]],
First [[Hedgehog Engine 2 - Physically Based Rendering (PBR)#Specular|Specular]] factor\; Gets multiplied by 0.25,
First [[Hedgehog Engine 2 - Physically Based Rendering (PBR)#Smoothness|Smoothness]] factor,
First [[Hedgehog Engine 2 - Physically Based Rendering (PBR)#Metallic|Metallic]] factor,
First [[Hedgehog Engine 2 - Physically Based Rendering (PBR)#Ambient Occlusion|Ambient Occlusion]];

specular,1,Any,
[[Hedgehog Engine 2 - Textures#PRM|PRM]],
Second [[Hedgehog Engine 2 - Physically Based Rendering (PBR)#Specular|Specular]] factor\; Gets multiplied by 0.25,
Second [[Hedgehog Engine 2 - Physically Based Rendering (PBR)#Smoothness|Smoothness]] factor,
Second [[Hedgehog Engine 2 - Physically Based Rendering (PBR)#Metallic|Metallic]] factor,
Second [[Hedgehog Engine 2 - Physically Based Rendering (PBR)#Ambient Occlusion|Ambient Occlusion]];

normal,0,Any,
[[Hedgehog Engine 2 - Textures#Normal map|Normal map]],
First [[Normal_mapping|Normal map direction]]_,,;

normal,1,Any,
[[Hedgehog Engine 2 - Textures#Normal map|Normal map]],
Second [[Normal_mapping|Normal map direction]]_,,;

normal,2,Any,
[[Hedgehog Engine 2 - Textures#Normal map|Normal map]],
Extra [[Normal_mapping|Normal map direction]] that is [[Texture Blending#Normal map blending|blended]] into the other normal maps_,,;

| parameters =

DirectionParam, [[Texture Blending#Directional blending|Directional blend direction]]__,;

NormalBlendParam,
[[Texture Blending#Directional blending|Directional blend intensity]],
[[Texture Blending#Directional blending|Directional blend offset]],
,;

| features =
is_compute_instancing,
is_use_tex_srt_anim,
enable_alpha_threshold,
is_use_gi_prt,
is_use_gi_sg,
is_use_gi

}}

Shadow Generations Shaders - DirectionBlend dpndpnn - Revision history

Justin113D: Added page