Escapism

Meursault loves a sun 'that leaves no shadows'.
To me, PERSONALLY, this relates to his uncompromising attitude to his ideals. He lives his life, black and white so to speak, there is no 'grey'. No lies. No pretence.

Holden, conversely, is the 'most terrific liar'. He constantly lies. For no reason. Think about the conversation/character interaction with Mrs Morrow.
He says he has 'a tiny little tumour on the brain', he manipulates Mrs Morrow, falsely eliciting her sympathy. He has a very flippant attitude to lying. He says only that he was 'shooting the bull'.
Likewise with Mr Spencer, he says he told a 'sheer lie' to escape the situation. How 'yellow'. He loves to escape.

He says 'if there's one thing I hate, its the movies.' Yet he constantly imagines himself to be a film star. Think about his conflict with Maurice. He imagines, after being ''''shot'''' by Maurice, Jane 'holding a cigarette for me'. This escapism is a shield. A method of protection. It makes it EASY for him. He lies above all to himself. SELF DECEPTION.

Meursault could therefore be said to be more heroic in comparison.
In the afterword to The Outsider Camu reference lying. 'We all do it, every day, to make life simpler.'
Meursault could lie, pretend he feels remorse. But instead he rather feels the whole thing is 'tedious'. And is therefore condemned for it. A martyr for the truth? Heroic?