As adjectives the difference between shadeless and shaderless
is that shadeless is without shade: exposed, not sheltered from the sun while shaderless is (computer graphics) without the use of shaders.
shadeless
English
Adjective
(-)
Without shade: exposed, not sheltered from the sun.
Without shades of colour.
shaderless
English
Adjective
(-)
(computer graphics) Without the use of shaders.