POM material

[anonymous_user_50a0b22d]

So I had some time to test myself and it’s an with the POM calculation indeed. It happens whenever the camera and world position match up on one axis. Since ‘InMaxOffset’ involves a division by the camera vectors 3rd channel leads to extreme values.

I just scrachted the divide node as a (temporary) workaround.

[Daedalus51]

Haha…**** you´re the man! Thanks a lot, very appreciate your help with (–>vector math noob :D)

[Netrve]

Anyone would be willing to upload a version one could replicate himself?
's version works, but I am not able to work the enhancements into it which were discussed in thread.
I think I wouldn’t be the only one appreciating that

Greetz,
Dakraid

[Wrekk]

Hello, I really love the shader, thank you so much for sharing!

But I have a problem with applying it to my landscape.
happens when I do it: Screenshot - 7d7731a708edf048014d76dde88e268b - Gyazo
I copy pasted what jonimake posted, and connected everything, and then applied it to my landscape.

Any ideas?

EDIT: is my landscape with my other material (without the POM shader): Screenshot - 66119723c3261b96276608286c1ed2d4 - Gyazo

EDIT2: Fixed it, it was the silhouette. I turned it off and now it’s fine.

[A-J-K]

would be cool if you guys can share the final shader casue i got a bit lost…

[anonymous_user_0df12f74]

@Adik;191824

would be cool if you guys can share the final shader casue i got a bit lost…

He already has on the previous page, just copy and paste into the material graph editor:

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   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_2456"
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int CurrSample = 0;

while ( CurrSample < (int) InNumSamples )
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float4 Temp = Material.Texture2D_0.SampleGrad( Material.Texture2D_0Sampler, InTexCoord + CurrOffset, InDX, InDY );
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float Delta1 = CurrSampledHeight - CurrRayHeight;
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      Inputs(2)=(InputName="InTexCoord",Input=(Expression=MaterialExpressionTextureCoordinate'"MaterialGraphNode_17.MaterialExpressionTextureCoordinate_4"'))
      Inputs(3)=(InputName="InDX",Input=(Expression=MaterialExpressionDDX'"MaterialGraphNode_15.MaterialExpressionDDX_1"'))
      Inputs(4)=(InputName="InDY",Input=(Expression=MaterialExpressionDDY'"MaterialGraphNode_16.MaterialExpressionDDY_1"'))
      Inputs(5)=(InputName="NormalHeightMap",Input=(Expression=MaterialExpressionTextureSampleParameter2D'"MaterialGraphNode_18.MaterialExpressionTextureSampleParameter2D_3"',Mask=1,MaskR=1,MaskG=1,MaskB=1))
      Inputs(6)=(InputName="InMaxOffset",Input=(Expression=MaterialExpressionMultiply'"MaterialGraphNode_33.MaterialExpressionMultiply_5"'))
      Inputs(7)=(InputName="InChannelMask",Input=(Expression=MaterialExpressionVectorParameter'"MaterialGraphNode_36.MaterialExpressionVectorParameter_1"',Mask=1,MaskR=1,MaskG=1,MaskB=1))
      MaterialExpressionEditorX=-544
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      MaterialExpressionGuid=1EDD63DA45662E4236E8DCA5D34BC953
      Material=PreviewMaterial'/Engine/Transient.PreviewMaterial_0'
   End Object
   Begin Object Name="EdGraphPin_2785"
      PinName="InNumSamples"
      PinType=(PinCategory="required")
      LinkedTo(0)=EdGraphPin'"MaterialGraphNode_10.EdGraphPin_2632"'
   End Object
   Begin Object Name="EdGraphPin_2786"
      PinName="InStepSize"
      PinType=(PinCategory="required")
      LinkedTo(0)=EdGraphPin'"MaterialGraphNode_11.EdGraphPin_2635"'
   End Object
   Begin Object Name="EdGraphPin_2787"
      PinName="InTexCoord"
      PinType=(PinCategory="required")
      LinkedTo(0)=EdGraphPin'"MaterialGraphNode_17.EdGraphPin_2825"'
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   Begin Object Name="EdGraphPin_2788"
      PinName="InDX"
      PinType=(PinCategory="required")
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   Begin Object Name="EdGraphPin_2789"
      PinName="InDY"
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   Begin Object Name="EdGraphPin_2790"
      PinName="NormalHeightMap"
      PinType=(PinCategory="required")
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   Begin Object Name="EdGraphPin_2791"
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      PinType=(PinCategory="required")
      LinkedTo(0)=EdGraphPin'"MaterialGraphNode_33.EdGraphPin_2869"'
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   Begin Object Name="EdGraphPin_2792"
      PinName="InChannelMask"
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   Begin Object Name="EdGraphPin_2793"
      PinName="Output"
      PinFriendlyName=" "
      Direction=EGPD_Output
      LinkedTo(0)=EdGraphPin'"MaterialGraphNode_38.EdGraphPin_2880"'
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   MaterialExpression=MaterialExpressionCustom'MaterialExpressionCustom_2'
   Pins(0)=EdGraphPin'EdGraphPin_2785'
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End Object
Begin Object Class=MaterialGraphNode Name="MaterialGraphNode_13"
   Begin Object Class=MaterialExpressionCustom Name="MaterialExpressionCustom_3"
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   Begin Object Class=EdGraphPin Name="EdGraphPin_2814"
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   Begin Object Class=EdGraphPin Name="EdGraphPin_2815"
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   Begin Object Class=EdGraphPin Name="EdGraphPin_2816"
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   Begin Object Name="MaterialExpressionCustom_3"
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{
clip( InFinalCoords );
clip( 1.0f - InFinalCoords );
}

return InFinalCoords;"
      OutputType=CMOT_Float2
      Description="CalcSilhouette"
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   Begin Object Name="EdGraphPin_2814"
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      PinType=(PinCategory="required")
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      PinName="InUseSilhouette"
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   MaterialExpression=MaterialExpressionCustom'MaterialExpressionCustom_3'
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End Object
Begin Object Class=MaterialGraphNode_Comment Name="MaterialGraphNode_Comment_0"
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   Begin Object Name="MaterialExpressionComment_5"
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      Text="NumSamples"
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   NodeComment="NumSamples"
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End Object
Begin Object Class=MaterialGraphNode_Comment Name="MaterialGraphNode_Comment_1"
   Begin Object Class=MaterialExpressionComment Name="MaterialExpressionComment_6"
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   Begin Object Name="MaterialExpressionComment_6"
      SizeX=1136
      SizeY=560
      Text="StepSize"
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      MaterialExpressionGuid=0323475A40A804AC8EE96F93FC84FDDF
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End Object
Begin Object Class=MaterialGraphNode Name="MaterialGraphNode_14"
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End Object
Begin Object Class=MaterialGraphNode Name="MaterialGraphNode_15"
   Begin Object Class=MaterialExpressionDDX Name="MaterialExpressionDDX_1"
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   Begin Object Class=EdGraphPin Name="EdGraphPin_2822"
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   Begin Object Name="MaterialExpressionDDX_1"
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   Begin Object Name="EdGraphPin_2821"
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End Object
Begin Object Class=MaterialGraphNode Name="MaterialGraphNode_16"
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   Begin Object Name="MaterialExpressionDDY_1"
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End Object
Begin Object Class=MaterialGraphNode Name="MaterialGraphNode_17"
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Begin Object Class=MaterialGraphNode_Comment Name="MaterialGraphNode_Comment_2"
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End Object
Begin Object Class=MaterialGraphNode Name="MaterialGraphNode_18"
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   Begin Object Name="MaterialExpressionTextureSampleParameter2D_3"
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   Begin Object Name="EdGraphPin_2826"
      PinName="UVs"
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   Begin Object Name="EdGraphPin_2828"
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      PinFriendlyName=" "
      Direction=EGPD_Output
      PinType=(PinCategory="mask",PinSubCategory="alpha")
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   Pins(0)=EdGraphPin'EdGraphPin_2826'
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   NodePosX=-1229
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End Object
Begin Object Class=MaterialGraphNode Name="MaterialGraphNode_19"
   Begin Object Class=MaterialExpressionCameraVectorWS Name="MaterialExpressionCameraVectorWS_3"
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   Begin Object Class=EdGraphPin Name="EdGraphPin_2832"
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   Begin Object Name="MaterialExpressionCameraVectorWS_3"
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      MaterialExpressionGuid=7C8042024244C915EC475EA1BE13608A
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   Begin Object Name="EdGraphPin_2832"
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      PinFriendlyName=" "
      Direction=EGPD_Output
      LinkedTo(0)=EdGraphPin'"MaterialGraphNode_20.EdGraphPin_2833"'
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   MaterialExpression=MaterialExpressionCameraVectorWS'MaterialExpressionCameraVectorWS_3'
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End Object
Begin Object Class=MaterialGraphNode Name="MaterialGraphNode_20"
   Begin Object Class=MaterialExpressionTransform Name="MaterialExpressionTransform_7"
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   Begin Object Class=EdGraphPin Name="EdGraphPin_2833"
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   Begin Object Class=EdGraphPin Name="EdGraphPin_2834"
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   Begin Object Name="MaterialExpressionTransform_7"
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      TransformType=TRANSFORM_Tangent
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   Begin Object Name="EdGraphPin_2833"
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      PinFriendlyName=" "
      PinType=(PinCategory="required")
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   Begin Object Name="EdGraphPin_2834"
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      Direction=EGPD_Output
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   MaterialExpression=MaterialExpressionTransform'MaterialExpressionTransform_7'
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   NodePosX=-2032
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End Object
Begin Object Class=MaterialGraphNode Name="MaterialGraphNode_22"
   Begin Object Class=MaterialExpressionComponentMask Name="MaterialExpressionComponentMask_5"
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   Begin Object Class=EdGraphPin Name="EdGraphPin_2835"
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   Begin Object Class=EdGraphPin Name="EdGraphPin_2836"
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   Begin Object Name="MaterialExpressionComponentMask_5"
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   Begin Object Name="EdGraphPin_2835"
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   Begin Object Name="EdGraphPin_2836"
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End Object
Begin Object Class=MaterialGraphNode Name="MaterialGraphNode_21"
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   Begin Object Name="MaterialExpressionComponentMask_6"
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   Begin Object Name="EdGraphPin_2838"
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      Direction=EGPD_Output
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End Object
Begin Object Class=MaterialGraphNode Name="MaterialGraphNode_23"
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   Begin Object Name="MaterialExpressionDistance_1"
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      PinFriendlyName=" "
      Direction=EGPD_Output
      LinkedTo(0)=EdGraphPin'"MaterialGraphNode_47.EdGraphPin_2909"'
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End Object
Begin Object Class=MaterialGraphNode Name="MaterialGraphNode_24"
   Begin Object Class=MaterialExpressionConstant Name="MaterialExpressionConstant_9"
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   Begin Object Name="MaterialExpressionConstant_9"
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   Begin Object Name="EdGraphPin_2844"
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      Direction=EGPD_Output
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End Object
Begin Object Class=MaterialGraphNode Name="MaterialGraphNode_28"
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   Begin Object Class=EdGraphPin Name="EdGraphPin_2857"
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   Begin Object Class=MaterialExpressionDivide Name="MaterialExpressionDivide_4"
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      Direction=EGPD_Output
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   Begin Object Name="MaterialExpressionDivide_4"
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End Object
Begin Object Class=MaterialGraphNode Name="MaterialGraphNode_30"
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[A-J-K]

The Pom works really nice on the ground but when putting it on a self created “imported” mesh “even a small one” i’m going out of performace 3/5 FPS on a GTX 780Ti…
Can anyone explain what the problem is? UE4 even crashed complitly ones…

[Netrve]

@;191829

He already has on the previous page, just copy and paste into the material graph editor:

Isn’t that the old shader? There are a few improvements which got discussed here and I don’t think those are incorporated yet in that code
I wished I could write shaders as good as many others here can, but I am just at the beginning of understanding how things work…

[Chesire]

@Adik;191852

The Pom works really nice on the ground but when putting it on a self created “imported” mesh “even a small one” i’m going out of performace 3/5 FPS on a GTX 780Ti…
Can anyone explain what the problem is? UE4 even crashed complitly ones…

Same here. Huge fps drop on static meshes and ultimately complete freeze of the editor (and pc…)

[A-J-K]

happens only with imported mashes… using the ue4 landscape or a primitive object build from the editor works perfect… i’m really curious what the reason for is…

[anonymous_user_50a0b22d]

The reason for is mesh complexity / tris count which doesn’t perform well with SampleGrad (ddx,ddy).
It’s possible to get a good amount of performance increase by replacing SampleGrad with SampleLevel.

Therefore change line of code
[FONT=Courier New]float4 Temp = Material.Texture2D_0.SampleGrad( Material.Texture2D_0Sampler, InTexCoord + CurrOffset, InDX, InDY );
to
[FONT=Courier New]float4 Temp = Material.Texture2D_0.SampleLevel( Material.Texture2D_0Sampler, InTexCoord + CurrOffset, 0.0 );

[Netrve]

I just noticed I haven’t done something I should have done first before asking for something more here…

Thank you for your work guys!

I use your material for multiple things and wouldn’t have been able to create it myself ^^

Greetz,
Dakraid

[A-J-K]

Cool many thanks…
Is the new code line a replacement for the old one? or do i need to have two pom shaders…like one for landscape with the old code line and one for meshes with the new code line… ?
I’m curious how the cryengine shader is working… cause it works really good with primitives but also with complex meshes…

I changed the code line… but i have still the same it’s not working on imported meshes…

[Wrekk]

@;166186

is possibly due to the way how decal projection work in UE4. Any transform from/to tangent space seems to return 0 for decals. If you calculate POM with the camera vector in world space it works, but only with non-rotated decals (somewhat similar to 's above).
Somebody would need to modify DeferredDecals.usf to make it work I guess.

As a hacky workaround you could use POM with the world space camera vector and transform it accordingly to the decal rotation per material instance.

Hey man, could you please guide me through ? I’d like it to work on decals, but I can’t figure out how.

[anonymous_user_3149ac211 (AngelTsvetkov)]

@;163748

Okay here is the material graph, theres a lot that can be improved, but is a pretty good starting point

Custom code blocks are as follows:

CalcParallax

float CurrRayHeight = 1.0;
float2 CurrOffset = float2( 0, 0 );
float2 LastOffset = float2( 0, 0 );

float LastSampledHeight = 1;
float CurrSampledHeight = 1;

int CurrSample = 0;

while ( CurrSample < (int) InNumSamples )
{
	float4 Temp = Material.Texture2D_0.SampleGrad( Material.Texture2D_0Sampler, InTexCoord + CurrOffset, InDX, InDY );
	CurrSampledHeight = ( ( Temp.r * InChannelMask.r ) + ( Temp.g * InChannelMask.g ) + ( Temp.b * InChannelMask.b ) );
	
	if ( CurrSampledHeight > CurrRayHeight )
	{
		float Delta1 = CurrSampledHeight - CurrRayHeight;
		float Delta2 = ( CurrRayHeight + InStepSize ) - LastSampledHeight;

		float Ratio = Delta1/( Delta1 + Delta2 );

		CurrOffset = ( Ratio ) * LastOffset + ( 1.0 - Ratio ) * CurrOffset;

		CurrSample = InNumSamples + 1;
	}
	else
	{
		CurrSample++;

		CurrRayHeight -= InStepSize;

		LastOffset = CurrOffset;
		CurrOffset += InStepSize * InMaxOffset;

		LastSampledHeight = CurrSampledHeight;
	}
}

return CurrOffset;

Output Type: CMOT Float 2
Inputs are:

1. InNumSamples
2. InStepSize
3. InTexCoord
4. InDX
5. InDY
6. NormalHeightMap (Not actually used, just there to ensure texture doesn’t get optimized out)
7. InMaxOffset
8. InChannelMask

CalcSilhouette

if( InUseSilhouette > 0.0f )
{
clip( InFinalCoords );
clip( 1.0f - InFinalCoords );
}

return InFinalCoords;

Output Type: CMOT Float 2
Inputs are:

1. InFinalCoords
2. InUseSilhouette

**NOTE: **Make sure that the height map is the first texture you drop into the material graph as the above custom code block accesses that texture directly via Material.Texture2D_0 and Material.Texture2D_0Sampler If you don’t drop it in first, it will be referencing the wrong texture. To fix that you will need to change those two values to whichever one is assigned to the heightmap.

, can you share how exactly achieve the displacement (tessellation) result on your picture POM2.jpg (for T_CobbleStone_Pebble_D and T_CobbleStone_Smooth_D). I tried so many variants with your height maps and exactly copy of your shader and material network (CalcParallax; CalcSilhouette; etc) but nothing work on even close to your result? I have 64 bit/PCD3DSM5 (DirectX11)? Thanks man

[Sitrec]

I’ve been using for a file (thanks !) and just recently finished up my landscape shader, using a material function that among other things contain POM material network. It worked great after figuring out which height maps to reference since there’s tons of maps in material. However, today when working on something else I noticed that it’s not working anymore, most materials doesn’t have any effect and some of them do but reference the wrong height map. I haven’t touched the material since I got it to work so I have no idea why it isn’t working.

I don’t know much about custom HLSL code works. Any idea why the sampler IDs have changed? Also, how can I prevent it from happening again?
Is there any way of knowing which ID a texture sampler have or can I somehow edit the code to reference from an input or something so it doesn’t have to be set in the code by hand?

Thanks in advance!

[Sotalo]

thread needs to be bumped. At the moment, is the greatest solution for parallax occlusion in UE4! I was wondering if it’s possible to offer a variant of code that uses a separate texture for the lowest layers, similar to the rock shader in the starter content. Also, if the sillhouette clipping can be used with different texture coordinates so it works with scaling, that would be perfect!

[The_Distiller]

Yeah. I really hope Epic will pick it up, polish and integrate it as a material function down the road.

[jonimake]

Or maybe someone else should bake the code of into a single material node and submit a pull request to epic.

[Sitrec]

@Sitrec;199163

I’ve been using for a file (thanks !) and just recently finished up my landscape shader, using a material function that among other things contain POM material network. It worked great after figuring out which height maps to reference since there’s tons of maps in material. However, today when working on something else I noticed that it’s not working anymore, most materials doesn’t have any effect and some of them do but reference the wrong height map. I haven’t touched the material since I got it to work so I have no idea why it isn’t working.

I don’t know much about custom HLSL code works. Any idea why the sampler IDs have changed? Also, how can I prevent it from happening again?
Is there any way of knowing which ID a texture sampler have or can I somehow edit the code to reference from an input or something so it doesn’t have to be set in the code by hand?

Thanks in advance!

Bumping .