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Pierre Tessier

How to avoid grainy reflections

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I'm using the standard renderer with a simple reflective surface (metal) with AO and GI. I often get this grainy gradient ;. How do I avoid this?

EJ-EQ-EX 5 fans_0013.jpg

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We are why rendering this with standard ? Physical far superior on these sorts of materials...

 

CBR

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    I haven't had much success with Physical and I find it often takes longer to render. What would you recommend as best settings in Physical? Thanks!

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    Adaptive / automatic / 10%, 3, 2, 2, 0 for a start. If you still get blurry reflections decrease the ET percentage <1% at a time until you see the blurriness samples go up a level... you shouldn't need to go lower than 5...

     

    If that is too slow, you can save a lot of time by removing the color channels of any material, and doing it as a base layer in reflectance instead. Also turn off any specularity - you don't need it - reflection alone should be fine.

     

    CBR 

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    Bang on CBR! Looks much better. Here's photo of what I'm looking for, as you see on the Bohn machine. Any idea how I could get even closer to that result?

     

    Thank.

    EJ-EQ-EX 5 fans_0013B.jpg

    Refrigeration-systems.jpg

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    Yes. Don't use straight reflectance for the front panel with the fans on it - that should be a special anisotropic reflectance layer to get the brushed look...

     

    CBR

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    Here's the front of the machine rendered with the Physical renderer and the settings you suggested. You can see the setting for the material I used. Looks OK but it doesn't look metallic enough. Needs a bit of reflection. What do you think?

    EJ-EQ-EX 5 fans_0013C.jpg

    Screen Shot 2020-05-05 at 3.25.17 PM.jpg

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    That's not anisotropic is it ? It should say that where it currently says beckmann ! Also you need that layer to be 100% in layer colour unless there is another layer under it doing a base coat.

     

    CBR

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    Also what is your environment ? What is actually being reflected ?

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    I don't see any difference with Anisotropic. What is the advantage of it? 

     

    As for the reflection, I have two planes with luminance material. 

     

    Thanks.

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