Len White

FWIW, I just bought a M4 MacBook Air and have been doing basic procedural modeling successfully for a few days.
HOWEVER, I just ran into an issue with POPs (Apprentice 20.5.613, Sequoia 15.5). Even a super simple network with only Gravity and Wind starts to misbehave in a way I've never seen (been using Houdini for about 9 years). It starts when I set the constant activation to "$F<=1". After that particles start disappearing on most frames, flashing in on occasion. Makes POPs unusable. I haven't tested any further to see what else sets off the issue.
EDIT: Restarting Houdini seems to have fixed the issue. The POPs networks are behaving again. Don't know what that was about.

Sorry for the necro-post here but is there any other trick to getting normal or bump maps to show up in the first place in the Houdini viewport with the Principled Shader?
I'm on 20.5.370 (Win 11 Nvidia GPU) and no bump or normal textures seem to have any effect on the viewport with the generic Principled Shader. My models have UVs and displacement via the same shader works fine. I've tried several png and rat files in the same parameter as probiner's image shows and no viewport change whatsoever. I've got a distant light, material applied, etc and mantra renders look correct. I'm going a bit crazy here.

UPDATE: Think Procedural discord helped me out - Switch from Vulkan to OpenGL in Prefs. This got me back normal maps in the viewport but it still shows nothing when using a simple bump map. Maybe that's not supported?

Thanks. That explains it.