Operating system: Windows-10-10.0.17134 64 Bits
Graphics card: GeForce GTX 1080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 419.67
Broken: version: 2.80 (sub 59), branch: Unknown, commit date: Unknown Unknown, hash: rBUnknown
Short description of error
Eevee is very slow under unexpected conditions.
Exact steps for others to reproduce the error
In the attached scene, rendering with Eevee is slow (press spacebar to playback and see the fps in the top left corner).
Open this blend and switch to render mode. It contains 5 coconut trees only.
Weirdly, by doing one of the following operation listed below, the fps suddenly jumps from 4fps to 40-60fps.
- Unplug the "Normal Map" node on the right from the "Diffuse BSDF" node next to it.
- Remove the "coconut_trunk" material slot from the active object, the palms. Note this material is useless, it's not assigned to any faces. However it seems it's still evaluated in the loop, causing important slowdown.
- Remove the "Wave" modifier from all palms objects.