Material Layering - Can't add Model Normal?

RashedAlmetrami

Hey guys, experimenting with the material layering system in 4.19. Materials are all blending together nicely but just having one problem; I can't seam to add the base normal map of my model. When I use 'Blendanglecorrectednormals' The stats come up with this error:

[SM5] /Engine/Generated/Material.ush(1901,2-39):  warning X3206: implicit truncation of vector type

[SM5] /Engine/Generated/Material.ush(1905,2-48):  warning X3206: implicit truncation of vector type

[SM5] /Engine/Generated/Material.ush(1905,2-48):  warning X3206: implicit truncation of vector type

[SM5] /Engine/Private/DeferredShadingCommon.ush(673,14-35):  error X4510: maximum ps_5_0 sampler register index (16) exceeded

I've also tried creating a custom function which does a similar job but I still get the same error; Am I missing something?

Obscura

Sorry but you are not going to make an ao generator function. You clearly don't know what you are doing.
Anyways, the problem is, the AO output is one component thing, its a scalar, and you are multiplying it by something with 3 components (the white pin of the texture gives 3 components, r, g, and b). Take the red or whichever channel of the AO texture and then it will work.

RashedAlmetrami

@Obscura The AO isn't the issue. I'm trying to get the normals to blend

Obscura

Sure thing but your ao multiply causes the compiler error.

Obscura

It also looks like you somehow exceed the 16 texture samplers limit which can be easily worked around by using shared samplers - which should be the default option by now, ffs Epic Games.

RashedAlmetrami

@Obscura no this error occurs even if I remove the AO blending completely

Obscura

Did you remove the ao intput and output in the get and set material attributes too?

RashedAlmetrami

Yeah this error occurred before I started experimenting with AO blending.

Obscura

Ok. Does it show up in a material instance? You can try to use a component mask with r-g-b ticked in after the blend angle corrected normals function, but I would be surprised if it wouldn't give a vector 3 by default.

RashedAlmetrami

Fixed it! Had my normals/AO linked up in the background layer

Obscura

Cool.