IBL sky image quality

# 1 21-01-2012 , 07:08 PM

Registered User
Join Date: Jan 2012

Posts: 4

My goal is to create outdoor scenes with dramatic looking clouds/lighting. I have been doing testing lighting my scene using IBL and high resolution HDR sky images. My problem is that no matter how high the resolution of the sky images I use for the IBL the sky area of the final render always looks blurry. Is there a way to make the IBL image look crisp in the the final rendered image?

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# 2 22-01-2012 , 11:32 AM

The thin red line
Join Date: Aug 2009

Location: England

Posts: 4,472

Not sure how you are attatching your image if you are using the file node theres a filter on it turn it off.............dave

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# 3 22-01-2012 , 12:36 PM

Lead Modeler - Framestore
Join Date: Feb 2003

Location: UK

Posts: 6,287

Yeah sounds like IBL...I wouldn't rely on it for your background image...You can try as daverave suggested but I think as its just a light node and not say an image mapped onto a polysphere, those blurry large pixels are there to stay

Use IBL to light the scene only you can put in a separate sky afterwards providing you have an Alpha Channel. Also if light emission is on keep the samples low in the U and V on the IBL setting...start with 8 and 8 and to test and then slowly increase it until you are happy...the default IBL settings are way to high.

IBL tends to scale to size of the scene or how the object are spread out so it may not give an accurate result that way.

Put the sky on a sphere in the scene and render it, that way and use the ambient color to increase the brightness...you'll probably get a better result providing the HDRI image is good -plus it will be faster in the long run...

Hope that helps
Jay

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IBL sky image quality

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