Thea Render supports a superior, unbiased core, which is one of the most advanced on the market and delivers stunning images without any compromises. All possible paths of lighting transfer are explored, delivering the highest accuracy without any artifacts. Sun-pool caustics and terminator artifacts are robustly handled, offering stunning results.
These two engines have no settings and are controlled only by the Sample and Time Limit.
Unbiased engine TR1 is optimal for exteriors and scenes with dominant direct lighting, while unbiased engine TR2 is optimal for extremely difficult indirect and caustic lighting.