Problems with rendering chrome material

Problems with rendering chrome material

abankstonRAS
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Message 1 of 19

Problems with rendering chrome material

abankstonRAS
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Participant

I'm trying to render a metal hook with a chrome material, but the renders look flat in some spots and reflections in other areas look too dark.  It makes the item look like a drawing, rather than photorealistic. I'm using the 2020 version of Maya and rendering with Arnold.  What settings can I change to get a better result?

 

chrome_test_23.png

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Message 2 of 19

damaggio
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Just use Arnold chrome preset.

chrome will reflect whatever is in your environment set up and lighting.

the settings are not in the shader necessarily.

Message 3 of 19

Anonymous
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@damaggio, do you use both V-Ray and Arnold? 

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Message 4 of 19

damaggio
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Vray only.

Message 5 of 19

abankstonRAS
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What other settings should I try?  I have to render on a totally white background, so I'm using AIrayswitch, an area light, and a skydome light.  Initially, I tried rendering with a backdrop, but it was giving me an off-white background, no matter what I tried.

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Message 6 of 19

damaggio
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Your render is correct with a white background, if you want to make more interesting then the environment has to be more interesting, white background is not a good choice here, chrome is the same as mirror.

try a studio light HDRI instead.

Message 7 of 19

abankstonRAS
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Participant

So this is probably the best I'm going to get with an all white background?  I would change the environment, but it's going to be used as a product image and has to be on all white.  Would you recommend rendering with a backdrop and then removing the off-white background in post?

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Message 8 of 19

damaggio
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Just edited my answer above.

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Message 9 of 19

abankstonRAS
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Mostly my problem is that I don't like how dark the reflections are on it.  It doesn't feel photorealistic to me.

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Message 10 of 19

abankstonRAS
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Thank you!  I'll try a studio light hdri and report back.

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Message 11 of 19

damaggio
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Use an studio HDR like real photographers do for product photograph.

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Message 12 of 19

abankstonRAS
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Ok, so the studio hdri definitely improved the flatness issue, but I still have the issue with those dark lines.  What is that, and how do I soften it, so it doesn't look so cartoonish?

 

chrome_test_24.png

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Message 13 of 19

damaggio
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Mentor

Those dark lines are either on the hdr image or your ray trace settings. I can’t tell without a scene file.

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Message 14 of 19

abankstonRAS
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I'm guessing they must be in the ray trace settings, but I'm not sure what to adjust.  Not sure if I can share the scene file since it's a proprietary design.

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Message 15 of 19

damaggio
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Read in the documentation about raytracing in render settings, in lights and in shaders. 
I ‘m on location now and won’t be available till tomorrow.

Message 16 of 19

abankstonRAS
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Participant

Will do.  Thank you for all of your help!

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Message 17 of 19

abankstonRAS
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Just a quick update.  I think I've got it worked out.  Thank you again for helping me!

 

chrome_test_31.png

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Message 18 of 19

Anonymous
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That came out nice!

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Message 19 of 19

abankstonRAS
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Participant

Thank you!

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