pybullet concave collision test

test.py

import pybullet as p
import time
p.connect(p.GUI)

#disable rendering during loading speeds it up
p.configureDebugVisualizer(p.COV_ENABLE_RENDERING,0)
p.configureDebugVisualizer(p.COV_ENABLE_TINY_RENDERER,0)
p.loadURDF("ground.urdf",useMaximalCoordinates=True)
for i in range (10):
        for j in range (10):
                p.loadURDF("sphere_small.urdf",[5-i,5-j,3], useMaximalCoordinates=True)
p.configureDebugVisualizer(p.COV_ENABLE_RENDERING,1)

p.setGravity(0,0,-10)

p.setRealTimeSimulation(1)
while (1):
        p.setGravity(0,0,-10)
        time.sleep(0.01)
~