cloth rendering with iray

[asha]

Hello,

I have tried to render a deformed cloth with iray. Although the per vertex normals seemed correct to me, the result is not smooth and it is faceted (please see the image below).

000131.png

I send the mesh file I am using. Besides, here is my options block if necessary:

options "options"
		object space
		shadow on
		contrast 0.1 0.1 0.1 0.1
		desaturate off
		dither off
		samples 1 3
		scanline off
		face both
		hardware off
		"iray" on
		"progressive" on
		"progressive min samples" 40
		"progressive max samples" 500
		"progressive error threshold" 0
		"iray devices" "0"
		globillum off
		caustic off
		trace on
		trace depth 5 5 10
end options

Can somebody explain me the point that I am doing wrong?

Thanks in advance,
Asha

[steve]

I guess the normals are not properly shared in your mesh. How do you create it ?

Here is what I got out of Maya nCloth with iray:

iray_cloth_on_ball.png