On 2021-11-25 1:06 PM (-4), Alain Martel wrote:
> I came to the conclusion that metallic finishes should have zero ambient
> through my own experimentation. The metallic textures from the various
> includes looked just wrong to me.
Yes, they do look horrible! My experiments with better metallic
textures began very soon after I downloaded POV-Ray.
> I started by commenting out the
> ambient. I got a massive improvement. Then, I tested with an explicit
> zero ambient and got the best, most realistic, result.
As I implied in the OP, I adopted the policy of reducing the ambient in
proportion to the diffuse, and wrote a macro to do this automatically.
Since a highly specular surface would have a low diffuse component, this
naturally leads to very low ambients. But the ambients in metals.inc
are *way* out of proportion to the diffuse components!
> When I first posted about it, I was unaware of Clipka's position on that
> The metallic finishes from metals.inc have been made to look acceptable
> in an empty scene against a black background, and that's the only
> situation where they look somewhat correct.
Or, how about using a bright sky_sphere along with a large hollow black
sphere with no_reflection. Our realistic low-ambient and no-ambient
metals will show up fine, no need for metals.inc's insane ambients.
Post a reply to this message