Thanks for the update.
Using Blender does work, but I understand that it disrupts the workflow if you’re building different spheres or want to change vertices. It’d also be cool and educational to do this entirely in Unity.
The code below is from Shanyan Teng. It was made for a video file, but it may be possible to modify it for the live stream. Unfortunately, I don’t understand it right now, though I’ve tested it with video file applications and it does work.
I’ll carve out some time and try it myself in the future.
Shader "ThetaInsideShader" {
Properties{
_MainTex("Base (RGB)", 2D) = "white" {}
}
SubShader{
Tags{ "RenderType" = "Opaque" }
Cull front // FLIP THE SURFACES
LOD 100
Pass{
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#include "UnityCG.cginc"
struct appdata_t {
float4 vertex : POSITION;
float2 texcoord : TEXCOORD0;
};
struct v2f {
float4 vertex : SV_POSITION;
half2 texcoord : TEXCOORD0;
};
sampler2D _MainTex;
float4 _MainTex_ST;
v2f vert(appdata_t v)
{
v2f o;
o.vertex = mul(UNITY_MATRIX_MVP, v.vertex);
v.texcoord.x = 1 - v.texcoord.x;
o.texcoord = TRANSFORM_TEX(v.texcoord, _MainTex);
return o;
}
fixed4 frag(v2f i) : SV_Target
{
fixed4 col = tex2D(_MainTex, i.texcoord);
return col;
}
ENDCG
}
}
}