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FYI: If you want to reduce the noise in your image, you can try reduce this by one the following methods:

• Smaller "Raystep multiplier" value
  
• Smaller "Stepwidth multiplier" value (if i have deduced correctly Raystep * Stepwidth = distance estimate steps... smaller = better)
  
• Bigger "Stepcount for binary" count value (increases accuracy of location of  surface)
  
• Bigger "Smooth normals" value (reduces roughness of surface)
  

And one I use often is - increase the image height & width (e.g. by clicking the Scale 'up' button twice) and reduce the image view (by clicking the 1:1 'down' button until it shows 1:4).

Here is an example:

Using 1 formula: BulboxP-2 (with default options) ...

Default rendering:


With more steps


With more smooth


With scaling