Adding additional textures to StandardSpecular.shader results in missing Normal Map, others (iOS)

Hi everyone,

When I add 6 additional texture tex2D() samplers to Unity's standard shader, the Normal Map (and detail) I have on the Mesh's material visually disappears.

My BuildTarget == iOS and editor Graphics Emulation == OpenGL ES 2.0, viewing in Editor and GamePlayer windows. I'm only using 3 of the 6 tex2D results, and my modified code lives in UnityStandardInput.cginc under Albedo() function. I'm using a modified StandardSpecular.shader. It's a skinned mesh, with my modified standard shader, with material slots set: Albedo, Specular, NormalMap, HeightMap, and my 6 custom ones.

If I switch to Graphics Emulation == No Emulation, then I see the Normal Map (and others) again... No problems running on iPhone Device either, I see my NormalMap there no problem (player settings are OpenGL ES 3 first, then OpenGL ES 2)

Any ideas?

(as an aside, why isn't there an OpenGL ES 3.0 option under Edit/Graphics Emulation? for BuildTarget == iOS .... seems missing on Android also )


StandardSpecular.shader changes:

_F("F", 2D) = "zeroRGBA" {}
_CustomColor("CustomColor", Color) = (0.68627451,0.090196078,0.0,1.0)
_A("A", 2D) = "white" {}
_B("B", 2D) = "bump" {}
_ABScale("ABScale", Float) = 1.0
_C("C", 2D) = "white" {}
_D("D", 2D) = "bump" {}
_CDScale("CDScale", Float) = 1.0
_EScale("E", 2D) = "bump" {}
_EScale("EScale", Float) = 1.0

UnityStandardInput.cginc changes:

sampler2D _F;
half4 _CustomColor;

sampler2D _A;
sampler2D _B;
float _ABScale;

sampler2D _C;
sampler2D _D;
float _CDScale;

sampler2D _E;
float _EScale;

half3 Albedo( float4 texcoords )
{
half3 albedo = _Color.rgb * tex2D (_MainTex, texcoords.xy).rgb;
half3 aa = tex2D (_A, texcoords.xy * _ABScale).rgb;
half3 bb = tex2D (_B, texcoords.xy * _ABScale).rgb;
half3 cc = tex2D (_C, texcoords.xy * _CDScale).rgb;
half3 dd = tex2D (_D, texcoords.xy * _CDScale).rgb;
half3 ee = tex2D (_E, texcoords.xy * _EScale).rgb;
half4 ff = tex2D (_F, texcoords.xy).rgba;

#if _DETAIL
#if (SHADER_TARGET < 30)
//SM20:instructioncount limitation
//SM20:nodetail mask
half mask = 1;
#else
half mask = DetailMask(texcoords.xy);
#endif
half3 detailAlbedo = tex2D (_DetailAlbedoMap, texcoords.zw).rgb;
#if _DETAIL_MULX2
albedo *= LerpWhiteTo (detailAlbedo * unity_ColorSpaceDouble.rgb, mask);
#elif _DETAIL_MUL
albedo *= LerpWhiteTo (detailAlbedo, mask);
#elif _DETAIL_ADD
albedo += detailAlbedo * mask;
#elif _DETAIL_LERP
albedo = lerp (albedo, detailAlbedo, mask);
#endif
#endif

float rAmt = 1.0f - clamp( ff.r, 0.0f, 1.0f );
rAmt = 1.0f - rAmt * rAmt * rAmt * rAmt * rAmt * rAmt;
float gAmt = 1.0f - clamp( ff.g, 0.0f, 1.0f );
gAmt = 1.0f - gAmt * gAmt * gAmt;
float bAmt = 1.0f - clamp( ff.b, 0.0f, 1.0f );
bAmt = 1.0f - bAmt * bAmt * bAmt;
float aAmt = 1.0f - clamp( ff.a, 0.0f, 1.0f );
aAmt = 1.0f - aAmt * aAmt * aAmt;
albedo = lerp(albedo, aa, gAmt);
albedo = lerp(albedo, cc, bAmt);
albedo = lerp(albedo, _CustomColor, rAmt);
albedo = lerp(albedo, ee, aAmt);

return albedo;
}

 

Unity keeps setting OpenGL ES 2.0 Emulation when in iOS or Android BuildType, even though I manually set Unity to "No Emulation", (under Edit / Graphics Emulation), Unity forgets this and resets back to OpenGL ES 2.0. Infuriating!

Well, to deal with this, I implemented this editor script, which sets Unity editor back to No Emulation. If you're frustrated by this as much as I was, You're welcome. Now, the above problem I illustrate, never happens. And old ES 2.0 devices fall back to no normal map (which is crazy), but I dont care because those devices are old and going away...