Comments (3)
Just normal tunneling problems because your geometry and bake box is just too thin for your velocity and the precision possible with a baked texture, which is what both nodes use for the particle collision.
The heighmap only works because you set the bake box to 50 units. If you shrink it to 0.5 like the other collision you get similar tunneling artifacts below the visible geometry on both but no leakage. The height map makes the particles sink less into the geometry but that is expected as it is its entire job and reason why it is a specialized node. If you increase the thickness of both you get no issue on both except that particles on the collision box sink a little more into the ground.
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I increased the thickness of the box and this indeed fixed the problem. But then again we're not talking excessively crazy speeds here. These particles are falling with default gravity from a height of 4 meters, which is about 8m/s. Is there a suggested way to deal with this if you don't want to have walls that are multiple meters thick to block things like raindrops?
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Is there a suggested way to deal with this if you don't want to have walls that are multiple meters thick to block things like raindrops?
Yes, set Fixed FPS to 0 on the GPUParticles3D node so it's simulated every rendered frame instead of a fixed 30 FPS. You can also set it to a fixed value that is higher than the default, which may lead to more predictable behavior.
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