toonpass - WebGL: INVALID_OPERATION...

[karimbeyrouti]

Issue: Three JS output scene is black. The scene flashes up on screen ( for 1 frame ) then goes black. This is using the toon.html demo from GIT ( no changes )

This happens only in Windows and the shader words as expect in OSX.
Setup: Chrome 33.0.1750.154 m (windows)
Tested in: Windows 7 & 8 ( all patched up)
Also happens in Internet Explorer.

Console output from Chrome:

Compiled Wagner.js:12
Could not initialise shader
VALIDATE_STATUS: false, gl error [0] three.min.js:494
Program Info Log: (350,29-95): error X3507: '_nearestLevel': Not all control paths return a value

Warning: D3D shader compilation failed with
default
flags.
Retrying with
avoid flow control
.

(350,29-95): error X3507: '_webgl_f362b64cb55e5d08': Not all control paths return a value

Warning: D3D shader compilation failed with
avoid flow control
flags.
Retrying with
prefer flow control
.

(350,29-95): error X3507: '_webgl_f362b64cb55e5d08': Not all control paths return a value

Warning: D3D shader compilation failed with
prefer flow control
flags.
Failed to create D3D shaders.
three.min.js:495
11
WebGL: INVALID_OPERATION: getUniformLocation: program not linked toon.html:1
21
WebGL: INVALID_OPERATION: getAttribLocation: program not linked toon.html:1
WebGL: INVALID_OPERATION: useProgram: program not valid toon.html:1
WebGL: INVALID_OPERATION: vertexAttribPointer: no bound ARRAY_BUFFER toon.html:1
WebGL: INVALID_OPERATION: useProgram: program not valid