I am getting a RuntimeError: Vertex shader failed to compile in iOS.
This does not occur in desktop browsers.
The app in question can be found in: http://mgiraldo.github.io/pic/
The error log starts with:
[Cesium WebGL] Vertex shader compile log: ERROR: 0:7: ‘’ : wrong operand types no operation '’ exists that takes a left-hand operand of type ‘uniform lowp samplerCube’ and a right operand of type ‘highp 4-component vector of float’ (or there is no acceptable conversion)
ERROR: 0:7: ‘assign’ : cannot convert from ‘uniform lowp samplerCube’ to ‘Position highp 4-component vector of float’
Any idea why this is happening?