vray glass render problem in 3ds max

[robm88]

hey everyone,

I having an odd issue with rendering a beer bottle with vray in 3ds max that doesnt seem to be a common one because I cant find a solution for it anywhere.

Basically when I render the bottle model the rendered image doesnt seem to accurately reflect the mesh. The thickness of the glass appears much thicker than it should be and when the liquid mesh is added, even though it overlaps the inside line of the glass, it doesn't fill out the space it should.

 

I have included rendered images of the bottle first without and then with the liquid added to show what I mean. As you can see there is a large empty area around the bottle eventhough in the viewport you can see that the bottle thickness is very small and the liquid outline is within the constraints like it should be.

 

If anyone can help in anyway I will be very thankful.

[abmitalia]

IOR > than 10,0 ? even if it shoud be about 1.6 - because even without liquid it seems to be wors than diamond IOR which is about 2,24

[robm88]

IOR for the glass is only set to 1.3, it doesnt make sense!

[abmitalia]

thats right - doesn't make sense at all - remodeling ? how did you model the bottle ?

[robm88]

I drew the shape of the bottle using a spline and then revolved it using lathe

[erickdt]

Is the glass of the bottle a solid object or are there walls to it?

 

E

[robm88]

there are walls to it, but they are really thin, not at all how it looks once rendered

[abmitalia]

than Shell modifier - right. Something happend over there, some override checked or bevel .. .. I would redo the bottle - and than see what happens

[robm88]

nope still no good, thinking it might be something to do with my render settin gs? not sure, what do you mean by shell modifier? i didnt use that

[abmitalia]

well - modeling a bottle you can shape the bottle outside form with a spline ( only spline ) than using lathe modifier and than shell modifier , so you have the walls. Looking at the images you send it seems that after the smooth modifier the inner part crashed . RK

[mfured20]

A breakdown of what Ralf means is this: Draw only the outer line of your bottle to the vertical halfway point, and not the inner wall. Apply a Lathe Modifier to the spline, so the line is the only thing you have spun. Then apply a Shell Modifier, which is basically an extrusion deal that does just what it sounds like.. makes your spline into a mesh. You can play with the dimensions to get the right look.

 

Also, when I was first starting out, every tutorial that I read said that you should never make your liquid come in contact with the glass in which it is housed. I can't now find those tuts, but it was saying that crossing or touching each other confuses the IOR setting. Try that too. if you lathe your solid liquid too, you can get pretty close to that inside diameter.

[abmitalia]

Thanks for translating - I saw those tutorials too but was told by a professional friend of mine ''that with raytrace render the meshs have to overlapp - otherwise I get false reflections '' so in this image they do overlapp. RK

[mfured20]

I dunno... This isn't the type of thing that I usually do, just reciting what I have heard over time. I would be interested in knowing one way or the other. I'm rendering right now so I can't do any tests on my own, but maybe I will have time tomorrow.

[abmitalia]

Well Matt, I render both styles out tomorrow too, here it's just late now .. Anyway I think its not the problem that Rob has - . I suppose its a modeling one -RK

[robm88]

Ah brilliant, you were spot on!

I remodelled it using the shell modifier and it looks great, thanks alot

[robm88]

I dont know if this helps, but the tut I was following also instructed to create the liquid inside of the walls of the glass and that it was ok so long as the boundaries were not in the exact same place??

[abmitalia]

great - so you resolved it. RK

[abmitalia]

AH - Matt. if you read it - I know your works and renders, you are a professional - I only ment first that a friend of mine told me about liquid rendering - hope you did't get it wrong . RK

[mfured20]

Haha, I am not worried about it. I just don't know anything about liquid rendering at all. I always set my OR to 1.01 so I never have to deal with it. It really is something that I should teach myself sometime, and that's all I meant. I'm glad we helped get Rob's problems worked out. No worries man!