POV-Ray : Newsgroups : povray.text.scene-files : negative strength blobs : Re: negative strength blobs Server Time
1 Jun 2023 15:06:04 EDT (-0400)
  Re: negative strength blobs  
From: Alain Martel
Date: 23 Feb 2023 09:35:51
Message: <63f779c7$1@news.povray.org>
Le 2023-02-23 à 01:22, Mike Miller a écrit :
> POV scene file using negative strength blobs to form cavities within the blob
> definition.
> Mike

Using current POV-Ray, max_intersection is pretty much obsolete.
Then, you should use assumed_gamma 1, and set file gamma to sRGB. That 
should be the default value.
No issue with lowering the ambient_light multiplier.

New with version 3.8 :
In the camera, the right vector now defaults to the aspect ratio of the 
output image and can be omitted.

In the finish, with fresnel on, you need an interior statement setting 
the IOR to something different than 1. Otherwise, there will be NO 
reflection at all. In the present case, for M_gold_paint, using 
reflection{.2 .5 metallic} would be a better option.
Then, redefine your floor like this :
//--- floor with fresnel reflection
plane { <0,1,0> 0 material{M_floor_paint}
	interior{ior 1.5}

conserve_energy only work with transparent pigments. In this scene, it 
have no effect as there are no transparent pigment.

Happy and good poving

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