13.1 raytrace.rchit references incorrect values

[eidloi]

Hello,

I found an issue in the tutorial code snippets. The referenced normal is not defined. The previous step defines nrm and worldNrm. scnDesc is also undefined. The previous step uses objDesc instead.

Cheers!

[eidloi]

14.4 also refers to normal instead of the previously mentioned nrm or worldNrm