+ Reply to Thread
Results 1 to 6 of 6
Like Tree1Likes
  • 1 Post By Ernest Burden

Thread: Confused making mirror materials! Which one would you choose ?

  1. #1
    Junior Member
    Join Date
    Nov 2013
    Location
    Delft
    Posts
    13

    Name
    orpv silence
    Forum Username
    orpvsilence

    Netherlands

    Post Confused making mirror materials! Which one would you choose ?

    Only changed the default setting in refelctions ;

    1. texture editor - default bitmap texfresnel replaced by none
    2. texture editor - parralel color to white ( 255 )
    3. texture editor - IOR 1,55 set to 50
    4. general reflection - 1,0 set to 50
    5. other method ??

    Test setup ; method 1,2 & 4 gives good mirror results. Method 4 has a red ( 255 ) glare. I,m confused, because this is a method a lot of tutorials recommend. ( https://www.youtube.com/watch?v=PvfhfYz2QWc )

    Mirror material_01.jpg

    Which method would you use and why ?

  2. #2
    Senior Member
    Join Date
    Mar 2013
    Location
    Oslo
    Posts
    467

    Name
    Nicolai Bongard
    Forum Username
    nicolaibongard

    Norway

    Default Re: Confused making mirror materials! Which one would you choose ?

    Set diffuse to black (0,0,0) reflection to white (255,255,255) and do not use fresnel?

  3. #3
    Junior Member
    Join Date
    Nov 2013
    Location
    Delft
    Posts
    13

    Name
    orpv silence
    Forum Username
    orpvsilence

    Netherlands

    Default Re: Confused making mirror materials! Which one would you choose ?

    @ Nicolai,

    Thanks you method 5 works good. Result is like method 1,2&4. For the setup my diffuse color was red ( 255,0,0 )

    What I don't understand; Method 3 uses by default the natural fresnel effect on materials ( texfresnel ) and a IOR of 1,55. Boosting the IOR ( fresnel index ) up to 50, you would expect total reflection, preview texture editor ( white / gray ), but a red glare remains ?

    1. preview texture editor ( black ) - diffuse color red ( 255,0,0 ) - result ; good mirror
    2. preview texture editor ( white / gray ) - diffuse color red ( 255,0,0 ) - result ; good mirror
    3. preview texture editor ( white / gray ) - diffuse color red ( 255,0,0 ) - result ; red glare on the mirror
    4. preview texture editor ( black ) - diffuse color red ( 255,0,0 ) - result ; good mirror
    5. preview texture editor ( black ) - diffuse color red ( 0,0,0 ) - result ; good mirror

    My conslusion is tor the perfect mirror ;
    A : Don't tamper in reflection ; texture editor ; IOR, let it by default 1,55.
    B : Only change in reflection ; texfresnel to none or parallel to white and diffuse color doesn't matter !

  4. #4
    Veteran Member Ernest Burden's Avatar
    Join Date
    Apr 2002
    Posts
    5,776

    Name
    Ernest Burden III
    Forum Username
    Ernest Burden

    United States

    Default Re: Confused making mirror materials! Which one would you choose ?

    A perfect mirror material is not a photo-realistic mirror, since real mirrors are not perfect. Polished metal has micro-pits and some fresnel and a glass mirror has glass over the silver. Both of those things affect the look in a rendering.

    You can use a mirrored surface to create effects in a view, but it's surface must be fully raytraced, which adds to rendertimes.

    But yes, Diffuse black, Reflection white. IOR of 1.55 is for glass. You would not need IOR for "perfect" reflections, but if you want it, you would use something more like IOR 22
    Last edited by Ernest Burden; 1 Week Ago at 10:23 AM.
    digitalputty likes this.
    Ernest Burden III
    AcmeDigital
    architectural rendering.

  5. #5
    Junior Member
    Join Date
    Nov 2013
    Location
    Delft
    Posts
    13

    Name
    orpv silence
    Forum Username
    orpvsilence

    Netherlands

    Default Re: Confused making mirror materials! Which one would you choose ?

    @ Ernest,

    Adding to the conslusion:
    C: Toggle around with the IOR ( 20-30 ) for more realistic mirror effects ( the imperfect surface / mirror ) " the glare effect "

  6. #6
    Junior Member
    Join Date
    Dec 2017
    Posts
    15

    Name
    Arch Man
    Forum Username
    archman



    Default Re: Confused making mirror materials! Which one would you choose ?

    In general it is good to make the reflection in the mirror a little darker. So you can choose black diffuse color and not use full 255,255,255 reflection value, but a little lower. That way the mirror doesn'r blur into the surrounding so much, it sometimes can be confusing for an eye if it has 100% reflectivity. I once worked with a person who made a postproduction on interior photography sessions and they did it with all mirrors ( in photoshop )

+ Reply to Thread

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

     

Similar Threads

  1. making bronze mirror in Vray
    By ananddevarajan in forum General Discussions
    Replies: 0
    Last Post: May 2nd, 2014, 03:59 AM
  2. Reflection of mirror materials
    By gilbertloo in forum V-Ray
    Replies: 1
    Last Post: June 27th, 2013, 02:40 PM
  3. Reflection of mirror materials
    By gilbertloo in forum General Discussions
    Replies: 0
    Last Post: June 27th, 2013, 10:39 AM
  4. Confused about making a CV
    By nelpiper in forum General Discussions
    Replies: 10
    Last Post: September 29th, 2009, 04:02 PM
  5. Making convincing materials: which SHADER to use?
    By nisus in forum General Discussions
    Replies: 10
    Last Post: November 12th, 2003, 10:42 AM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts