How to highlight 2 walls from two sides?

Question

Unity

How to highlight the left wall so that it looks the same as the right one, using only one light source?

Answer 1

Use a different type of light source. Yours is directional. Use spot. Or change direction.

Answer 2

$merged = [];

foreach ($a1 as $key = > $value) {
  $merged[] = [$value, $a2[$key]];
}

var_dump($merged);