KeyShot Forum

Technical discussions => Data Import => ZBrush => Topic started by: ghostweeble on February 26, 2015, 03:07:44 pm

Title: Sharp shadows setting in Keyshot problems.
Post by: ghostweeble on February 26, 2015, 03:07:44 pm
I've got a question regarding some problems I'm seeing with Sharp shadows in Keyshot.

I've noticed that using some HDRI's I get lighting where the shadows are very unrealistic – looking like painted spots, vs. shadows. This seems to be tied to HDRI's with brighter light sources.

I've included a render that exhibits what I'm describing below.

This model is using the default Matte grey material in Keyshot, so there is only diffuse shading – no specular/gloss highlights.

It's being lit by the default hdri-locations_urban_4k HDRI included in Keyshot, but similar anomalies occur with other HDRI's. As you can see, there are sharp patches of shadow that are not realistic. Are there ways to avoid this or improve sharp shadow rendering in Keyshot or other reasons why I might be getting these anomalies?

Thank you,

mm

Title: Re: Sharp shadows setting in Keyshot problems.
Post by: KeyShot on February 26, 2015, 07:11:39 pm
It is a bug that we are aware of and it will be fixed in KeyShot 6. It is related to the high contrast of that environment. There are two ways you can work around it. You can reduce the contrast of the HDRI using the slider, and you can add a local light source (such as a small area light or point light) to cast the sharp shadows.