apply_light_arc: now using fancy math(tm) && adjustable beam width. Also, visual artifacts (this is a feature>.>)
Car headlights cumulative. apply_light_arc: Optional 4th beam-width argument, cleanup, more experiments
Remove possibly premature optimization that is causing artifacts in light raytracing.
Merge pull request #3 from kevingranade/light_artifacts

Remove possibly premature optimization that is causing artifacts in light raytracing.
Remove deprecated debugging vars, luminance multiplier 4=>3
Merge remote branch 'origin/master' into mo_betta_headlights
Remove old code, set defaults to original "best looking"
 apply_light_ray: trig_brightcalc argument (optional, default false)
 apply_light_arc: use light rays with the above option = true
Merge lightmap refactor to use trig functions instead of iterative methods.