# Vray glass

 10 October 2012 dextervfx New Member   portfolio Dexter Alexandru Manea Buzau, Romania Vray glass Hello all, In Vray for Maya an IOR of 1.5(which is what i learnt in the physics class light has) will deform any object that is behind my glass object dramatically,the fix i keep finding for this is setting the IOR to 1 which doesn`t sound that physicaly correct and will affect the angle of total reflection resulting in a wrong fresnel effect.Is there a better solution for this? share quote
 10 October 2012 ACiD80 On the run!   Kris . Graphic designer extraordinaire Belgium An ior value of 1.5 to 1.6 is correct for most glasses. If you look through a glass it bends light just like you describe, this is correct behaviour. Air has an ior of approximatly 1.0002926... but in 99.9% of the cases you wont notice the difference between this and just 1.0. 1.0 means light goes straight through and does not get bent. If thats the effect you are after then use 1.0. If you want correct glass refractions then look up that particular glass type's ior (quite easy to find, theres even a table on wikipedia if i am not mistaken) and use that. Last edited by ACiD80 : 10 October 2012 at 11:39 PM. share quote
 10 October 2012 dextervfx New Member   portfolio Dexter Alexandru Manea Buzau, Romania Originally Posted by CHRiTTeR: An ior value of 1.5 to 1.6 is correct for most glasses. If you look through a glass it bends light just like you describe, this is correct behaviour. Air has an ior of approximatly 1.0002926... but in 99.9% of the cases you wont notice the difference between this and just 1.0. 1.0 means light goes straight through and does not get bent. If thats the effect you are after then use 1.0. If you want correct glass refractions then look up that particular glass type's ior (quite easy to find, theres even a table on wikipedia if i am not mistaken) and use that. the problem is that light bends too much for a car windshield, at 1.5 it looks like a fisheye lens .coud it be because i've made the glass too thick? Last edited by dextervfx : 10 October 2012 at 10:02 AM. share quote
 10 October 2012 ACiD80 On the run!   Kris . Graphic designer extraordinaire Belgium Originally Posted by dextervfx: the problem is that light bends too much for a car windshield, at 1.5 it looks like a fisheye lens .coud it be because i've made the glass too thick? yes, possibly... a cars windshield is about 0,635 cm (0,25 inch) thick could you post a picture? Last edited by ACiD80 : 10 October 2012 at 12:08 PM. share quote
 10 October 2012 CGTalk Moderation Expert Thread automatically closed This thread has been automatically closed as it remained inactive for 12 months. If you wish to continue the discussion, please create a new thread in the appropriate forum. __________________ CGTalk Policy/Legalities Note that as CGTalk Members, you agree to the terms and conditions of using this website. share quote

 Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts vB code is On Smilies are On [IMG] code is On HTML code is Off CGSociety Society of Digital Artists www.cgsociety.org Powered by vBulletinCopyright ©2000 - 2006, Jelsoft Enterprises Ltd.