Some weird reflections

[patricksnelgar]

Hey guys (and gals),

Recently completed this tutorial which produced the result in the attatchment (FinalRender.jpg).

I then decided to apply this method of lighting to my own Ferrari 333SP, using the same car paint material as the tutorial (shellac with two vrayMat sub materials).

This produced a problem with reflections (as indicated in the problem.jpg attatchment)

 

Any ideas on cause + how to fix?

 

FYI the odd reflections only occur when viewing from the front.

 

P.S. The material is -exactly- the same as the tutorials'

 

[christofferthulin]

Do you have the exact same lighting setup?

[patricksnelgar]

For the Ferrari no, but I used the same technique to create the lighting /reflections.

Also I have exported the car into the scene I used for the FinalRender and it still produces the same result.

[Francisco Penaloza]

can you post a screen shot of your lighting set up? that strange reflection can be anything.

Over all it seems too dark for a product display setup.

[patricksnelgar]

Here you go, also included light settings.

[christofferthulin]

Try to render with only one light at the time to see if it's a lighting issue.

[patricksnelgar]

Here are renders with one light active each.

 

[Chris MacDonald]

Looks like a smoothing issue to me.

 

Failing that, using the shellac shader with vray is never a good idea, the shellac material doesn't conserve energy. Use the VRay Blend material instead.

[patricksnelgar]

Thanks for the advice, sadly changing from shellac to VRayBlend had no effect (or at least non that I am aware of)

 

Here is a head on shot with all three lights enabled.

 

[Francisco Penaloza]

man this renders are so dark that it is hard to understand what's going on, That lighting is not right. For a product visualization you need to show in some ways the shape of your object in this case your car, you need to put some visible lights or self illuminated planes simulating soft boxes around your car to create nice soft reflection that will help to shape your car, everything black around is not right, all what I can see now is the car reflecting it self, and there is nothing wrong with that.

[patricksnelgar]

While I understand your point that the renders are too dark for final production, I have not yet set up the end lighting rig as I am still in the process of modelling the car so all I use is the ambient lighting set up, and I don't want to wait years simply for a test render after moving a line.

Regarding the car reflecting itself, I agree that there is nothing wrong with it, but all the reference images I have there are no reflections visible.

[patricksnelgar]

I'm not using my final lighting set up as I am still in the process of modelling the car.

Agreed self reflections on a car are not wrong, but this one does not seem natural

[Chris MacDonald]

Well try switching to VRay RT and move around the car, watch how the "error" moves and work out whether or not it is a reflection or something is actually wrong.

[aminrahimi]

I agree with Francisco, but I think it will help you to create some plane around your car or a C-line which will make your scene more realistic and studio like. Besides, these planes or C-line will make a good effect on reflections.

[patricksnelgar]

I have found that top down and straight on don't produce the reflections.

What do you mean by C-line? I've never come across that term before (after all I'm fairly new to vray and studio set-ups, modelling is my main focus)

[christofferthulin]

He meens that you should model a studio environment for your render. This can be done in many ways but a C-line is what often is used in real studio photographing.

 

This is an example:

http://www.aleso3d.com/blog/?p=1133

[patricksnelgar]

Intriguing you should mention that set-up (I have encountered that tutorial before, just didn't know what it was called).

Also following that tutorial produced very poor results, the lighting was a mix of brown and blue, not the grey scale background shown in the tutorial. But seeing as someone has actually mentioned it as recommended, I will give it a second chance.

[aminrahimi]

I didn't tell you follow that tutorial, maybe as u said its lighting settings ain't good enough. but yes, the C-line is something like that...

I recommend you to follow this tutorial to create a good studio like scene, once you created that, you can use it for every single object you model.

 

http://cienel.net/3d_studio_max-tutorials/design-a-sofa-in-3d-studio-max/4

[patricksnelgar]

Wow thanks for that link, looks very useful.

Will try it when I get home and post results.