Hi,
Sean has left the following comment at Determine why solids.sh fails on
64-bit http://www.google-melange.com/gci/task/view/google/gci2012/7982217:
that's gold
So that's certainly the high-level "cause" -- the shade_inputs message is
saying that a ray was returned with a normal facing away from the camera.
The ray is probably nearly perpendicular to the camera as the ray barely
grazes a surface/edge.
The dot products are clearly very "near zero" so it could be an issue of
not properly testing the ray we're returning or the normal being computed
for the particle object.
FYI, the differences in floating point are expected. Single precision
floating point falls apart around 7 digits after the decimal point so some
variation can be expected. As long as the values are below 0.0005, our
calculations should be stable. That's our guarantee.
Greetings,
The Google Open Source Programs Team
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