want to creat that kind of gloss

[chow choppe]

hi everyone

 

i am using max 9 and vray 1.5

 

i am trying to create highlight on the glass so that it shines as if reflecting the sun. not only glass but metallic surfaces also show that kind of highlight and the material is shown in form of gradient.see the following examples i have attached in CgA attachments taken from ginsun's threads which show glass and shiny surfaces with that effect.

 

 

i am trying to create that effect by changing highlight glossiness but that looks like a circular gloss instead of gradient effect. and i am not able to create effect like that. please see the image and help me how can i improve and create that kind of material

 

 

P.S maybe ginsun can help me out with this if possible

 

thanks

[Mr-JosE]

It looks to me that those highlights have been painted in, probably in Photoshop.

 

The highlights you see in reality are just the sources of light being reflected. If you want to be accurate with your scene here you will need to put in a source of light that is visible to reflections. This is easily accomplished when using V-Ray lights (or sun). The other thing to be mindful of is the angle of the camera, you may not see the highlight at the angle you wish to take the shot.

 

In the end it maybe best just to paint them in using Photoshop.

[Nic H]

looks like a gradient with blending modes and opacity played around with in photoshop.

 

just render out a multimatte element (object ID) from max for your various glass objects use these masks with transperant gradients in photoshop to suit.

[Ky Lane]

Just play with reflective glossiness and a light source.

[chow choppe]

looks like a gradient with blending modes and opacity played around with in photoshop.

 

just render out a multimatte element (object ID) from max for your various glass objects use these masks with transperant gradients in photoshop to suit.

 

u mean do a separate pass for glass material?

 

just render out a multimatte element (object ID) havent understood this

[Nic H]

no I mean use vray render elements- add a multimatte (it outputs 3 masks per element - ie. 1-Red 2-Green 3-Blue according to object ID's) object for your glass and then when you render it wil output a coloured mask to use in PS.

 

Is that clear?

[whitetr]

It doesn't look like the glass is reflecting anything. Make sure your reflection (color) is cranked up. Also, you need something to reflect, so put a nice image in the environment or reflect override slot. For edges, chamfered edges catch highlights pretty well, or use the VrayEdgeTexture in the bump channel to cheap a chamfer.

[AJLynn]

There's always HDR. In the reflection environment.

[Ky Lane]

first thing I would do is bung a direct light source int he top right, and put some glossiness to my reflections; and play from there.

[whitetr]

Yes, but is it a nice image? If you use VRay sun, it creates a VRay sky by default...but it's plain...nothing special. So, by default, your reflections would be bland.

[chow choppe]

no I mean use vray render elements- add a multimatte (it outputs 3 masks per element - ie. 1-Red 2-Green 3-Blue according to object ID's) object for your glass and then when you render it wil output a coloured mask to use in PS.

 

Is that clear?

 

 

hi nicnic

 

i go to render elements and click on add and then where to find multimatte?

i can see vray object id render element but not multimatte.

 

Can u put up some screenshots if possible. and i always wondered when i looked into some psd files of chinese renderings that they have a layer in which they had materials in form of these colors R, G,B and i guess it isthe same technique so that they cud make the selections easier in PSD and then put textures in it and play with it.

 

So please lemme know more on this technique

 

regards

 

regards

[Tyorl]

BTW u can stiil use Mix map of Vray sky and any other map for your environment

[chow choppe]

no I mean use vray render elements- add a multimatte (it outputs 3 masks per element - ie. 1-Red 2-Green 3-Blue according to object ID's) object for your glass and then when you render it wil output a coloured mask to use in PS.

 

Is that clear?

 

okay

i found multimatte element and assigned it also

i tried working on a sample scene with just 3 boxes

when i add multimatte element and render. after rendering the image it opens another VFB and renders it completely black. What settings shud i use

how this multimatte thing works

I cant find it on spot3d.com also

 

Please help

 

Thanks

[chow choppe]

finally i figured it out

U have to right click on object and go to properties and change object id to 1, 2 or 3

and then u get those colors

 

So its like saving alpha channels for specific objects

 

although it has not sorted out my actual query but i learnt a new thing today

 

Thanks all

[Nic H]

yep thats it!

 

use those rgb channels as selections in PS and apply a transperant gradient over the area you want to build up the gloss using blending modes, maybe screen, overlay or lighten - also muck around with opacity.

 

or you can unlock highlight glossiness like others said and put it on a value like .4 - .5 maybe, might want to control it with a falloff map in h-glossiness as well.