Having trouble rendering only half of a sphere in three.js

I'm currently working on a skydome project in three.js and here is how I am approaching it:

var geometry = new THREE.SphereGeometry( 40, 32, 15, 1*Math.PI/2, 2*Math.PI, Math.PI, Math.PI);
var material = new THREE.MeshBasicMaterial( { color: 0xddddff } );
mesh = new THREE.Mesh( geometry, material );
mesh.material.side = THREE.DoubleSide;
scene.add( mesh );

However, while this code successfully renders half of a sphere, it also colors the area that I intended to be open (the surface needed for the skydome). How can I troubleshoot and fix this issue?

javascriptthree.js

Answer №1

  1. Creating a custom skydome using a custom mesh is highly recommended as drawing half a sphere may not correctly position UVs.

  2. If you opt to use a skydome, consider using mesh.material.side = THREE.BackSide instead of .DoubleSide, especially if you will not be staying on the surface constantly.

Answer №2

My approach to drawing the sphere was flawed:

var geometry = new THREE.SphereGeometry( 50, 60, 60, Math.PI, Math.PI, 3*Math.PI/2);
var material = new THREE.MeshBasicMaterial( { color: 0xddddff } );
mesh = new THREE.Mesh( geometry, material );
mesh.material.side = THREE.DoubleSide;
scene.add( mesh );

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