Tag Archives: HDRI gamma

KeyShot 3 – HDRI Contrast Confusion?

Don’t get caught out by subtle changes between KeyShot 2 and KeyShot 3 when using the HDR Light Studio plug-in, or in fact any HDRI map.

You’ll notice that the Environment settings tab now has a ‘Contrast’ setting which has replaced the old Gamma slider found in KeyShot v2. If you create a new scene in KeyShot 3 this Contrast setting is set to 2.5. I changed this back to 1 straight away to ensure the HDRI lighting information was going to be used accurately, without any contrast adjustments being made which would alter the relative brightness of each light. But I quickly found out that my lighting was just not working as expected and looked terrible. It turns out the setting of 2.5 was in fact correct and is the equivalent to the old environment gamma setting of 1. Continue reading

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