Depth Test Doesn't Work When Depth Buffer Set to False While Creating Render Target

Description of the problem

This is an image from webgl_rtt.html sample.

When I set depthBuffer to false, the depth test doesn’t work.

rtTexture = new THREE.WebGLRenderTarget( window.innerWidth, window.innerHeight, { minFilter: THREE.LinearFilter, magFilter: THREE.NearestFilter, format: THREE.RGBFormat, depthBuffer: false } );

Three.js version

Current version

Browser

• All of them
• Chrome
• Firefox
• Internet Explorer

OS

• All of them
• Windows
• macOS
• Linux
• Android
• iOS

[WestLangley]

Depth testing in the render target requires a depth buffer so there is something to depth test against.

The fiddle appears to be working as expected. https://jsfiddle.net/p4ob9d2e/2/

[immiao]

Here’s the jsfiddle:

https://jsfiddle.net/p4ob9d2e/

Change line 76 to depthBuffer: true then it works well.