Vray free: many questions

[Guest nazcaLine]

hi guys. i've been foolin' around with vray free in an old model i have, and i have many qustions. as u see in the attached images, the glass has a weird look. reflections seem ok, as u see in the kandinsky chairs. what happens with the glass?? any tips or advice?? why does it look so strange in the material editor? and , in the night scene, why the lights are burned out?? i used photometric point lights, web distribution. i tried standard lights, but nothing. in short: i'd like to know what the limitations are in vray free, what I can and cannot achieve with this, according to your experience.

[Ismael]

Your material editor "Glass" looks weird because Vray is telling you with that display that it has no idea what the material is. Well, it knows it is a Raytrace material and it is not recommended that one uses those even with Vray Full or otherwise called Vray Advanced. Do you know what the glass should look like Raytraced in Viz or Max? Then work with the Vray Map in a Standard Material to get the same result.

 

The blownout lights is another thing. Viz and Max have a thing called "Exposure Control", but I think that does not work with Vray Free. Vray Advanced allows the use of the Logarithmic type among others. Your best bet is to adjust the intensity of your light to eliminate the burn. You can use "fill lights" to get your ambient just right.

 

Best luck,

 

Ismael

[anvaraziz]

dont use raytrace with v-ray

[Guest nazcaLine]

thank you for your advice so far...i won't use raytrce material, then...but how can i get a decent glass with vrayfree? oh, and I forgot to ask about that glow in the drywall element under the ceiling. there isn't any light in that place, it isn't supposed to be lit!!!!

[Ray]

Make a standard glass material, but use a vray map in the reflection slot. And you have your lights set to use vray shadows, right?

[Tim Saunders]

along the lines of what ray said. use the vraymap material type.

if you are looking for some fresnel falloff (which you should for large surfaces with reflection), then load in a mix in the reflection slot. this works good because a plain vray map reflection is too evenly distributed and has no fresnel. and i find straight falloff doesn't give enough reflection in the less "angular" areas. so try the mix, load in falloff in the top slot, then in the falloff parameters, load vraymap. go back to the mix parent and load vraymap. then give a mix percentage of 40-60. then back to the top parent giving the total reflection slot a value of 50-80.

vray free has it's limitations (no vray lights and other vray materials). but it does feature the vray map which is great for reflections, and vray shadows which also have some easy parameters.

that glow above your suspended ceiling, not too sure. i had a similar light leak once and it was because i had advanced raytrace and global settings checked on accident. uncheck global settings on all your lights and give vray shadows.

[Guest nazcaLine]

thank you for your advice guys i really appreciate it. the vray map will give me the reflections of the glass, but what about transparency? vray map also? or just a 15% opacity in the standard material? you may be right with the global settings, i'll try, that glow is really strange. up t the moment i've been working with photometric lights and it's really fine. i find it more simple (and fast) to put photometrics with vray shadows than vray lights (i have demo version also), they take terribly long. and i noticed that with free version i dont get thousands of messages saying "this color/material is not compatible with vray" that annoy me in the demo version. it might be my impression but free seems a bit faster than the demo, i might be wrong. right now i'm trying a model of a restaurant i posted some time ago (standard lights w scanline) with vray free, let's see what comes out...