How do i create a realistic chrome shader?

[tonyhaer]

I've tried to do it with a HDRI image and dgs material but you really have to have HDRI with not much colour in it, and not too dark etc.. otherwise it ends up reflecting strong colours and looks nothing like chrome. Can someone tell me the best way to get a realistic chrome texture. my model isn't very curved which makes it harder it seems (lots of flat pieces) it also seems to only reflect chrome like on some of the parts and not others even though they all have the same shader

[joojaa]

YOu need a fresnell ramp into the reflection color an reflectivity port. See chrome and all other materials reflect more on glancing angles then head on.

1. your ray depth limit is too shalow.

[tonyhaer]

thanks joojaa where do i find a fresnell ramp and which attribute on the dgs material do i add it to? as i can't see a reflectivity option. 

[joojaa]

Dont use dgs material (you really dont want to theres no reason to do so), either use mia material or a phon or blin with facing ratio connrected to ramp and form then on to reflectivity channel.

[tonyhaer]

ok have used mia material connected facing ratio of sampler to ramp u and v and then connected to reflection in mia material.

This is what i have i can see its much better illuminated now but doesn't look chrome, how do i make it more reflective and chrome like? do i still use a hdri? 

Also how much do think would be adequate for max trace depth, should i also up the reflections and refraction's at the moment they are on 10