Hello Jürgen,
If you would like some suggestions for a specific model, please feel free to send it to us at and we’ll take to look to see if we can find any optimisations. (Try using a web-based file sharing service like Dropbox if the file is too big for email.)
In general, the complexity of the lighting set-up and the amount of ‘glossy’ materials in the scene make the biggest difference to render speeds. 10000 elements shouldn’t be a problem for a ray tracer like Shaderlight, unless each one is extremely geometrically complex.
For lighting, if you have light coming from the sun / sky, make sure you use portal lights to enclose interior spaces to speed up the rendering of partially shadowed areas. Also, make sure no lights are ‘embedded’ in the surfaces of your models. This would result in lots of noise due to random shadowing of the light source by the surface it’s embedded in, and the renderer will spend a lot of time trying fruitlessly to eliminate that noise.
When choosing materials, try to go easy on the Glossy material type and the Brushed and Satin finishes within the Metal materials. These materials require Shaderlight to trace many more rays to calculate the blurry reflections, so if the blurry reflections aren’t necessary for the look you want to achieve, one of the other material options might give you quicker results.
Hope that helps,
Shaderlight support
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