JSFiddle - React, Tailwind, and code Playground

JavaScript

reg=/[^"\\s]+\.(jpg|png|gif|bmp)/gi;
chaine='newmtl 03___Default\
	Ns 10.0000\
	Ni 1.5000\
	d 1.0000\
	Tr 0.0000\
	Tf 1.0000 1.0000 1.0000 \
	illum 2\
	Ka 0.5882 0.5882 0.5882\
	Kd 0.5882 0.5882 0.5882\
	Ks 0.0000 0.0000 0.0000\
	Ke 0.0000 0.0000 0.0000\
	map_Ka la image.bmp\
	map_Kd la image.bmp';

console.log( chaine.match(reg) )