Add check that materials of the same type generate the same GLSL to test added in previous commit.
Add check that materials of the same type generate the same GLSL to test added in previous commit.

progsung/cesium,ggetz/cesium,esraerik/cesium,denverpierce/cesium,aelatgt/cesium,aelatgt/cesium,NaderCHASER/cesium,omh1280/cesium,emackey/cesium,denverpierce/cesium,CesiumGS/cesium,NaderCHASER/cesium,CesiumGS/cesium,jason-crow/cesium,jasonbeverage/cesium,hodbauer/cesium,emackey/cesium,jason-crow/cesium,AnimatedRNG/cesium,ggetz/cesium,hodbauer/cesium,aelatgt/cesium,ggetz/cesium,oterral/cesium,geoscan/cesium,omh1280/cesium,kaktus40/cesium,soceur/cesium,wallw-bits/cesium,YonatanKra/cesium,kiselev-dv/cesium,soceur/cesium,CesiumGS/cesium,wallw-bits/cesium,hodbauer/cesium,AnimatedRNG/cesium,progsung/cesium,ggetz/cesium,denverpierce/cesium,denverpierce/cesium,oterral/cesium,jason-crow/cesium,jason-crow/cesium,omh1280/cesium,likangning93/cesium,esraerik/cesium,wallw-bits/cesium,esraerik/cesium,YonatanKra/cesium,emackey/cesium,esraerik/cesium,likangning93/cesium,emackey/cesium,YonatanKra/cesium,AnalyticalGraphicsInc/cesium,omh1280/cesium,josh-bernstein/cesium,NaderCHASER/cesium,likangning93/cesium,oterral/cesium,jasonbeverage/cesium,soceur/cesium,kiselev-dv/cesium,CesiumGS/cesium,AnalyticalGraphicsInc/cesium,AnimatedRNG/cesium,YonatanKra/cesium,aelatgt/cesium,wallw-bits/cesium,kiselev-dv/cesium,likangning93/cesium,kaktus40/cesium,AnimatedRNG/cesium,likangning93/cesium,josh-bernstein/cesium,geoscan/cesium,kiselev-dv/cesium,CesiumGS/cesium