TiglViewer: Wrong shader code with OCCT >= 7.6.0, Zebra-Stripes not working

[rainman110]

When running TiGLViewer with OCCT 7.6.0 and above, I get the following error from the fragment shader in the TiGL Viewer Console:

TKOpenGl | Type: Error | ID: 0 | Severity: High | Message:
  Failed to compile Fragment Shader [Graphic3d_ShaderProgram_1]. Compilation log:
0(438) : warning C7011: implicit cast from "bool" to "int"
0(459) : warning C1503: undefined variable "occFrontMaterial_Shininess"
0(459) : warning C1503: undefined variable "occBackMaterial_Shininess"
0(474) : warning C7011: implicit cast from "bool" to "int"
0(510) : warning C1503: undefined variable "occFrontMaterial_Shininess"
0(510) : warning C1503: undefined variable "occBackMaterial_Shininess"
0(523) : warning C7011: implicit cast from "bool" to "int"
0(537) : warning C1503: undefined variable "occFrontMaterial_Shininess"
0(537) : warning C1503: undefined variable "occBackMaterial_Shininess"
0(577) : warning C1503: undefined variable "occFrontMaterial_Ambient"
0(577) : warning C1503: undefined variable "occBackMaterial_Ambient"
0(578) : warning C1503: undefined variable "occFrontMaterial_Diffuse"
0(578) : warning C1503: undefined variable "occBackMaterial_Diffuse"
0(579) : warning C1503: undefined variable "occFrontMaterial_Specular"
0(579) : warning C1503: undefined variable "occBackMaterial_Specular"
0(580) : warning C1503: undefined variable "occFrontMaterial_Emission"
0(580) : warning C1503: undefined variable "occBackMaterial_Emission"
0(581) : warning C1503: undefined variable "occFrontMaterial_Transparency"
0(581) : warning C1503: undefined variable "occBackMaterial_Transparency"
0(459) : error C1008: undefined variable "occFrontMaterial_Shininess"
0(459) : error C1008: undefined variable "occBackMaterial_Shininess"
0(510) : error C1008: undefined variable "occFrontMaterial_Shininess"
0(510) : error C1008: undefined variable "occBackMaterial_Shininess"
0(537) : error C1008: undefined variable "occFrontMaterial_Shininess"
0(537) : error C1008: undefined variable "occBackMaterial_Shininess"
0(577) : error C1008: undefined variable "occFrontMaterial_Ambient"
0(577) : error C1008: undefined variable "occBackMaterial_Ambient"
0(578) : error C1008: undefined variable "occFrontMaterial_Diffuse"
0(578) : error C1008: undefined variable "occBackMaterial_Diffuse"
0(579) : error C1008: undefined variable "occFrontMaterial_Specular"
0(579) : error C1008: undefined variable "occBackMaterial_Specular"
0(580) : error C1008: undefined variable "occFrontMaterial_Emission"
0(580) : error C1008: undefined variable "occBackMaterial_Emission"
0(581) : error C1008: undefined variable "occFrontMaterial_Transparency"
0(581) : error C1008: undefined variable "occBackMaterial_Transparency"

I suppose, OCCT has changed the layout of the shader definitions.

The result is, that the zebra stripe plot is not working.