View Full Version : Negative BSP Value

06 June 2009, 06:12 AM
What does it mean when the average BSP depth is in the negative range?

RCI 0.3 info : max depth : 45
RCI 0.3 info : max leaf size : 4122
RCI 0.3 info : average depth : -31
RCI 0.3 info : average leaf size : 6
RCI 0.3 info : leafnodes : 58679257
RCI 0.3 info : bsp size (Kb) : 3249223
RC 0.3 progr: rendering finished
RC 0.3 info : wallclock 0:03:16.40 for rendering
RC 0.3 info : allocated 2242 MB, max resident 5213 MB

06 June 2009, 04:01 AM
silly me, this just happens when FG only mode is on.

06 June 2009, 10:20 AM
This is still confusing the hell out of me, the only way I can see a BSP tree having a negative depth is if the engine is reducing the number of polys on a surface, but that would almost certainly create non-convex geometry - unless you've subdivided very simple geometry a lot!

06 June 2009, 12:40 PM
Well this scene does have billions of polys in it. Most of which are a lot of instances and geo shaders, there is also quite a large ground plane imported in from another application, but I'm not sure why I am getting a negative BSP value either.

Everything is working fine and renders very quick so nothing wrong with the scene, but this was very strange to me, I just want to know what it means too.

That number does change and if it is set to render normal mode and I cancel a render when it's generating final gather tiles I will also get a negative BSP value, so it's not just FG only mode when this happens.

CGTalk Moderation
06 June 2009, 12:40 PM
This thread has been automatically closed as it remained inactive for 12 months. If you wish to continue the discussion, please create a new thread in the appropriate forum.