3 teapots with different materials. 50 bounces. 1spp, 2548 frames accumulated. Render time = 0:15:52. Haven't figured out why the image has so many fireflies.

For the materials, I have switched to Disney diffuse BSDF, and GGX for the specular part. The renderer is also changed to use progressive rendering, and volumetric path tracing is been added with bounded homogenous medium.

The wings are free 3D assets from: https://sketchfab.com/3d-models/angel-wings-33a689cfaf33427286c8f98956f5cd1e.

The image is rendered with 20 bounces, 1spp per frame, accumulated 2117 frames, final render time = 0:09:22.