3D Textures on Android?

Hey Everyone,

I'm running into issues trying to get 3D Textures working on Android. Pink (error) materials are appearing on objects that are using this shader.

Below is the 3D Texture shader. This works fine in windows builds and in the editor. But not with Android.

Please let me know if you need any more information. My hunch is that Android doesn't support 3D textures. (https://docs.unity3d.com/Manual/class-Texture3D.html) Though, I've tried searching for proof and cannot seem to find anything. I'm no Android / OpenGL / Shader whizz so I may be missing something simple!

Is there any reason the below shader wouldn't work on Android?

Thanks in advance,
Harrison

Code (CSharp):

1. // Upgrade NOTE: replaced '_Object2World' with 'unity_ObjectToWorld'
2.  
3. Shader "Unlit/_3DTextureTest_Trans"
4. {
5.     Properties
6.     {
7.         _MainTex("Texture", 3D) = "white" {}
8.         _Alpha("Alpha", Range(0, 1)) = 0.2
9.        
10.     }
11.         SubShader
12.     {
13.         Tags{ "Queue" = "Transparent" "RenderType" = "Transparent" }
14.         ZWrite Off
15.         Blend SrcAlpha OneMinusSrcAlpha
16.         LOD 100
17.  
18.         Pass
19.         {
20.             CGPROGRAM
21.             #pragma vertex vert
22.             #pragma fragment frag
23.             // make fog work
24.             #pragma multi_compile_fog
25.  
26.             #include "UnityCG.cginc"
27.  
28.             struct appdata
29.             {
30.                 float4 vertex : POSITION;
31.                 float2 uv : TEXCOORD0;
32.             };
33.  
34.             struct v2f
35.             {
36.                 float2 uv : TEXCOORD0;
37.                 UNITY_FOG_COORDS(1)
38.                 float4 vertex : SV_POSITION;
39.                 float3 wpos : TEXCOORD1;
40.             };
41.  
42.             sampler3D _MainTex;
43.             float4 _MainTex_ST;
44.             float _Alpha;
45.  
46.             v2f vert(appdata v)
47.             {
48.                
49.                 v2f o;
50.                 o.vertex = UnityObjectToClipPos(v.vertex);
51.                 float3 worldPos = mul(unity_ObjectToWorld, v.vertex).xyz;
52.                 o.wpos = worldPos;
53.                 o.uv = TRANSFORM_TEX(v.uv, _MainTex);
54.                 UNITY_TRANSFER_FOG(o,o.vertex);
55.                 return o;
56.             }
57.  
58.             fixed4 frag(v2f i) : SV_Target
59.             {
60.                 // sample the texture
61.                 float3 texcoord = i.wpos.xzy;
62.                 //texcoord.xy = texcoord.yx;
63.                 texcoord.z += 1.5f;
64.                 texcoord.z = texcoord.z / (3*3);
65.  
66.                 texcoord.x /= 13.6875;
67.                 texcoord.y /= 10;
68.  
69.                 texcoord.x /= 30;
70.                 texcoord.y /= 30;
71.  
72.                 fixed4 col = tex3D(_MainTex, texcoord  );
73.  
74.                 if (texcoord.x > 1)
75.                     col = float4(0, 0, 0, 1);
76.                 if (texcoord.x < 0)
77.                     col = float4(0, 0, 0, 1);
78.  
79.                 if (texcoord.y > 1)
80.                     col = float4(0, 0, 0, 1);
81.                 if (texcoord.y < 0)
82.                     col = float4(0, 0, 0, 1);
83.  
84.                 col.a = _Alpha;
85.  
86.                 // apply fog
87.                 UNITY_APPLY_FOG(i.fogCoord, col);
88.                 return col;
89.         }
90.     ENDCG
91. }
92.     }
93. }
94.  

 

Hey aleksandrk,

Thanks for getting back so quickly. I've made an empty project with just a cube, material, and the shader. It works on Android! Probably should have tried that first... I'll have to do some more digging in the actual application. Annoyingly, the device logs aren't printing anything useful.

Thanks again!

EDIT:

It's working! I had to change Graphics API levels! Thanks so much!