The honeycomb does slow it down, but I know that it’s the ground that REALLY slows it down. Without the honeycomb grill, the rendertime is 2 minutes. With the honeycomb grill and without the ground, the rendertime is about 15 minutes, and with the honeycomb and the ground the rendertime varies from ~30 minutes to ~ 1 hour and 30 minutes. So It’s both the ground and the grill. Oh yeah, and ever since I made the grill, it was in a separate layer, like you said. So since I made the grill I have already compared the regular render time to the render time with a grill, to the render time with the grill and the ground. I would use the approximate feature for AO, but there’s a bug or just a natural artifact when you render objects realy close to each other, in which the shadow of the object gets unnaturally dark, and so does the other object:
<–With Approximate AO and grill/ Render time: 44 sec
<–With Approximate AO and no grill/ Render time: 14 sec
As you can see, there are unusually dark areas, so that’s why I have to use regular AO.