Shadow Generations Shaders - DirectionBlend dpnndpn - Revision history

Justin113D: Added more shader links

2025-08-25T14:04:54Z

Added more shader links

← Older revision		Revision as of 14:04, 25 August 2025
Line 8:		Line 8:
	* [[Texture Blending#Directional blending\|directional blending]] to interpolate between two texture sets		* [[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		* [[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

			This shader is essentially a combination of the {{ShaderLink\|Shadow Generations\|DirectionBlend_dpndpn}} and {{ShaderLink\|Shadow Generations\|Detail_dpnn}} shaders.

	\| overview bugs = This shader has a bug where the second normal texture is not applied.		\| overview bugs = This shader has a bug where the second normal texture is not applied.

Justin113D at 13:28, 25 August 2025

2025-08-25T13:28:25Z

← Older revision		Revision as of 13:28, 25 August 2025
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	\| technical =		\| technical =
	For some reason using the <code>IBL_CAPTURE</code> debug view the directional blend factor is set to 0.		For some reason using the <code>IBL_CAPTURE</code> debug view the directional blend factor is set to 0.
	Why this was done is unknown, and makes no sense.		<br/>Why this was done is unknown, and makes no sense, as this produces IBL textures with an incorrect looking environment.

	\| features =		\| features =

Justin113D: Added gallery

2025-08-25T13:19:08Z

Added gallery

← Older revision		Revision as of 13:19, 25 August 2025
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	[[Texture Blending#Directional blending\|Directional blend offset]],		[[Texture Blending#Directional blending\|Directional blend offset]],
	,;		,;

			\| gallery =
			File:ShadowGenerations DirectionBlend dpnndpn example.jpg{{!}}How <code>DirectionBlend_dpnndpn</code> is used in Shadow Generations to create a "moss" layer on top of the cliffs in Kingdom Valley
			File:ShadowGenerations DirectionBlend dpnndpn bug.png{{!}}Showing how the bug affects normals of the second set of textures

	\| technical =		\| technical =

Justin113D: Added bug warnings

2025-08-25T12:15:55Z

Added bug warnings

← Older revision		Revision as of 12:15, 25 August 2025
Line 9:		Line 9:
	* [[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		* [[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~~		\| overview bugs = This shader has a bug where the second normal texture is not applied.
	\|~~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 =		\| related shaders =
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	** Green and blue channels are unused		** Green and blue channels are unused
	* Alpha is unused		* Alpha is unused

			\| bugs =
			When the shader unpacks the <code>normal[2]</code> texture, the tangent and binormal vectors are left at 0, which results in no change by the normal map at all.

			<br/><b>Speculation:</b>
			The developers could have attempted to implement multi-tangent here, but must have compiled the shader before the multi-tangent system was properly implemented, which left the tangent and binormal at 0 and resulted in incorrectly unpacking the normal map.

	\| textures =		\| textures =

Justin113D at 12:06, 25 August 2025

2025-08-25T12:06:54Z

← Older revision		Revision as of 12:06, 25 August 2025
Line 5:		Line 5:

	\| overview =		\| 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 =		\| related shaders =

Justin113D: Created page with "{{Shader Documentation | game = Shadow Generations | shader name = DirectionBlend_dpnndpn | sbo = model=2, no_noise, no_transparent_layer | overview = An advanced PBR shader that uses directional blending to interpolate between two texture sets. | related shaders = Blend_dpnbdpn, Blend_dpndpn, BlendDetail_dndnd, BlendDetail_dpndpnn, Detail_dpndpn, Detail_dpnn, DirectionB..."

2025-08-25T12:02:13Z

Created page with "{{Shader Documentation | game = Shadow Generations | shader name = DirectionBlend_dpnndpn | sbo = model=2, no_noise, no_transparent_layer | overview = An advanced PBR shader that uses directional blending to interpolate between two texture sets. | related shaders = Blend_dpnbdpn, Blend_dpndpn, BlendDetail_dndnd, BlendDetail_dpndpnn, Detail_dpndpn, Detail_dpnn, DirectionB..."

New page

{{Shader Documentation
| game = Shadow Generations
| shader name = DirectionBlend_dpnndpn
| 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.

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

| behavior =

=== Distance blending ===
Uses [[Texture Blending#Distance blending|distance blending]] to interpolate
* from the <code>normal</code> texture
* to the <code>normal</code> and <code>normal[1]</code> textures [[Texture Blending#Normal map blending|blended]] together
for the normal map of the first set of textures.

 The shader uses <code>detailDistance</code> and <code>detailFadeRange</code> from the stage RFL to determine the detail range.

=== 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[2]</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> (after[[#Distance blending|distance blending]]) 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,
Detail [[Hedgehog Engine 2 - Textures#Normal map|Normal map]],
Detail [[Normal_mapping|Normal map direction]]_,,;

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

| parameters =

DetailFactor,
UV scale for the <code>normal[1]</code> texture,,,;

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

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

| technical =
For some reason using the <code>IBL_CAPTURE</code> debug view the directional blend factor is set to 0.
Why this was done is unknown, and makes no sense.

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

}}