I'm more or less brand new to Houdini and have been trying a basic cloth sim but have had some problems. As you can see in the image both in and on the folds I'm getting some strange shading artifacts like the smooth shading is breaking down, almost as if the direction of the shading is being flipped on some faces. It's a tool shelf grid for the cloth object and static torus for the collision object.
I feel like I must be missing something really basic but have googled, read the docs and just hit a wall with how to fix this. If anyone could shed some light on why this might be happening it would be really helpful, I've played with the settings a lot and tried normal and facet nodes (though I may of been putting those in the wrong place!).