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In these lesson I’ll talk about Final Render and Post Production.

 

INDEX

• What is ExtraTex channel
• How to use it for Ambien Occlusion pass
• Improve irradiance map and light cache
• What is “noise threshold” for final renders
• Composite AO with photoshop
• Add flares effects
• 13 mins narrated video showing all the process
• Final Blue Villa scene to download  / 120mb

 

Time to complete this lesson: 15 – 20 mins
This is the final image every student could produce after completing this lesson:

 

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Until now we worked in “test mode”, that means a fast way to check lighintg and materials:

• Irradiance map = Low
• Light Cache = 500
• Noise Threshold = 0,01 (default value)
• Antialiasing = Adaptive Subdivisions

Before to run the final render – with all right V-Ray Settings – I want to introduce a way to add details. It is called ambient acclusion (AO) and we’re creating a new “layer” just for this one.

Watch the video:

CONCEPTS

• Just Add VRayDirt in ExtraTex channel to get Ambient occlusion pass
• Use “radius” to extract  small or big details from the scene
• Use “noise threshold” as main control to get high or low quality renders
• Don’t use noise threshold lower than 0,003
• 0,005 already produce an important increase of the render times
• Save all channels by clicking “save all image channels”

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Final Render settings

These are the parameters I modify for the final render:

• Irradiance map = High
  Best  distribution of global illumination
• Light Cache = 2000 / enable “Raytrace”
  Enhance  distribution of global illumination in the details
• Noise Threshold = 0,005
  Reduce grainess for all elements in the scene (vraylights, cameras, materials…)
  Pay attention with this parameter: too low values could produce terrific render time increase!
• Antialiasing = Adaptive DMC (min-max / 1-30)
  Produce more details, especially in the textures

Some parameter could be different from the FINAL-Present you studied at Lesson 2.
Actually every scene is different, it’s up to you find the best combination to low the render time.

HEY [wlm_firstname]!
These parameters won’t affect “aesthetic impact”. The scene must be “beautiful” also with low settings.
Your scene won’t be beutiful just incresing values for final render! This is crucial to understand.

This is the final render after the V-Ray calculation:

Note: With i7 processor this render took around  3h to be completed.

 

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Post Production

Many people don’t know how to correctly manage the Ambient occlusion layers.
The best way is using masks. Watch this video:

 

CONCEPTS:

• To center, drag and drop images into others by holding SHIFT key
• Use Multiply blending mode for ambient occlusion passes
• Reduce the effect using opacity 20-30%
• Use masks to remove AO in useless areas
• AO in the wall corners usually produce fake results

> Dowload PSD showing AO compositing

 

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Tip: Adding Lens Flares

There are many ways to add lens flare effect, I already wrote about it in this lesson: V-Ray Lens Effect.

At this time I want to suggest another way: personally I prefer to keep separated layers if I can. It’s better to keep the full control on your final result.

Here the trick:

• Add “lens effect ” layers in screen mode
• Download here a “Lens Flares Pack”  > download Lens Flares
• For my post production I used “green refl”

Note: There’s also a  fantastic photoshop plugins to do that: Knoll Factory. Check it 😉

 

 

Now your have all information you need to easily achieve this result.
Just do it and be proud of yourself! 😉

 

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 Exercise

Download the Max file with all materials and complete
Finale Render (step4) and Post Production (step 5).

FILES:

• Blue Villa: max file (for starting step 4 and 5)
• All textures

TASKS:

– Create new channels for Ambien occlusion (with VRayExtraTex)
– Change V-Ray settings for final render
– Composite AO in Photoshop
– Add Lens Flares in Photoshop

 

SOLUTION:
To verify your exercise and/or for any doubt, please download:

• Blue Villa: max file – complete
• PSD with final postproduction
  

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