A skin for a vehicle interior trim part, which skin comprises at least a translucent elastomeric layer composed of a pigmented plastic material, the translucent layer having an outer surface and an inner surface opposite the outer surface, and the translucent layer comprising at least one first portion which is configured to be placed in front of a light source and to transmit visible light generated by said light source from said inner surface to said outer surface, wherein said first portion of the translucent layer comprises a surface relief on the outer surface and/or on the inner surface thereof to produce an image on said first portion when said visible light is transmitted through said first portion of the translucent layer, which surface relief forms at least one first area, where the translucent layer has a thickness which is smaller than or equal to a first thickness (d 1) and at least one second area, where the translucent layer has a thickness which is larger than or equal to a second thickness (d 2) which is larger than said first thickness (d 1), with the difference (d 2 -d 1) between said first thickness (d 1) and said second thickness (d 2) larger than 0.08 mm but smaller than 3.0 mm, and said pigmented plastic material has over at least one range of visible light wavelengths an average spectral attenuation coefficient (α av), which average spectral attenuation coefficient is the average of spectral attenuation coefficients (α( λ)) determined for different wavelengths (λ) in regular intervals, in particular in intervals of 5 nm, over said range of visible wavelengths by the following formula: α λ = − ln T 1 λ d 1 wherein: di = said first thickness; and T 1 (λ) = the spectral transmittance at said wavelength (λ), measured in accordance with EN ISO 13468-2:2006 part 2, of a film of said pigmented plastic material having a uniform thickness equal to said first thickness (d 1), said average spectral attenuation coefficient (α av) being comprised between 1.0 and 25 mm -1 and being related to the difference (d 2 -d 1) between said first (d 1) and said second thickness (d 2) according to the following formula: α av d 2 − d 1 > − ln a wherein: a = 0.50. said first portion of the translucent layer comprises a surface relief on the outer surface and/or on the inner surface thereof to produce an image on said first portion when said visible light is transmitted through said first portion of the translucent layer, which surface relief forms at least one first area, where the translucent layer has a thickness which is smaller than or equal to a first thickness (d 1) and at least one second area, where the translucent layer has a thickness which is larger than or equal to a second thickness (d 2) which is larger than said first thickness (d 1), with the difference (d 2 -d 1) between said first thickness (d 1) and said second thickness (d 2) larger than 0.08 mm but smaller than 3.0 mm, and said pigmented plastic material has over at least one range of visible light wavelengths an average spectral attenuation coefficient (α av), which average spectral attenuation coefficient is the average of spectral attenuation coefficients (α( λ)) determined for different wavelengths (λ) in regular intervals, in particular in intervals of 5 nm, over said range of visible wavelengths by the following formula: α λ = − ln T 1 λ d 1 wherein: di = said first thickness; and T 1 (λ) = the spectral transmittance at said wavelength (λ), measured in accordance with EN ISO 13468-2:2006 part 2, of a film of said pigmented plastic material having a uniform thickness equal to said first thickness (d 1), di = said first thickness; and T 1 (λ) = the spectral transmittance at said wavelength (λ), measured in accordance with EN ISO 13468-2:2006 part 2, of a film of said pigmented plastic material having a uniform thickness equal to said first thickness (d 1), said average spectral attenuation coefficient (α av) being comprised between 1.0 and 25 mm -1 and being related to the difference (d 2 -d 1) between said first (d 1) and said second thickness (d 2) according to the following formula: α av d 2 − d 1 > − ln a wherein: a = 0.50.