shadows dropping the frame-rate based on camera distance #34757

New Issue

Chris Smith · 2013-03-24T17:07:25+01:00

Chris Smith commented

2013-03-24 17:07:25 +01:00

Category: Rendering

%%%I think Ive found a bug with the shadows dropping the frame-rate based on camera distance.
It happens only when the game engine is started with shadow maps close to the camera.

in my scene i get about 200 frames with my amd 7950 however when this oddity kicks in it goes and locks down to around 30 and the rasterizer hits 30ms.
if the game engine is started while still viewing the same set of shadows but with a larger distance between the shadows and the active camera the frame rate starts with over 200 fps again.

Another thing that i found odd is that if i start the game engine a fare distance away from the shadow mapping and then go look up really close with the game still running no frame-rate drop will occur. And I say up close not really that close maybe about 3 to 4 blender units viewing distance away and it will start to happen.

In the blend Ive uploaded to make it more apparent Ive made the objects quite high-poly just to show the drop in frame-rate better,
as it seems like its dependent on how close the object is to the light that's casting the shadows.

And also in the blend its set to camera 1 up close to the shadows where the frame-rate drop happens with game-start, and you can then change to camera 2 with numpad 2 to then see the frame-rate rise again (fingers crossed) and you can also then go back to camera one with numpad 1 with no longer a drop in frames.

Took three screen grabs to show what happens clearly, probably best to check those out first.

few other things ive tested

happens with sun lamp shadowshappens with spot light shadows
happens with simple and variance type shadowmappinghappens with 64bit&32bit blender 2.66a
//Same thing happens in blender and in blenderplayer

it just happens ^_^

Cpu intel 3570k
Gpu amd 7950
OS Windows 7 sp1 64bit
blender version 2.66a

%%%

**Category**: Rendering %%%I think Ive found a bug with the shadows dropping the frame-rate based on camera distance. It happens only when the game engine is started with shadow maps close to the camera. in my scene i get about 200 frames with my amd 7950 however when this oddity kicks in it goes and locks down to around 30 and the rasterizer hits 30ms. if the game engine is started while still viewing the same set of shadows but with a larger distance between the shadows and the active camera the frame rate starts with over 200 fps again. Another thing that i found odd is that if i start the game engine a fare distance away from the shadow mapping and then go look up really close with the game still running no frame-rate drop will occur. And I say up close not really that close maybe about 3 to 4 blender units viewing distance away and it will start to happen. In the blend Ive uploaded to make it more apparent Ive made the objects quite high-poly just to show the drop in frame-rate better, as it seems like its dependent on how close the object is to the light that's casting the shadows. And also in the blend its set to camera 1 up close to the shadows where the frame-rate drop happens with game-start, and you can then change to camera 2 with numpad 2 to then see the frame-rate rise again (fingers crossed) and you can also then go back to camera one with numpad 1 with no longer a drop in frames. Took three screen grabs to show what happens clearly, probably best to check those out first. few other things ive tested *happens with sun lamp shadows*happens with spot light shadows *happens with simple and variance type shadowmapping*happens with 64bit&32bit blender 2.66a //Same thing happens in blender and in blenderplayer it just happens ^_^ Cpu intel 3570k Gpu amd 7950 OS Windows 7 sp1 64bit blender version 2.66a %%%

Chris Smith commented

2013-03-24 17:07:25 +01:00

Changed status to: 'Open'

Aaron Carlisle commented

2019-06-29 02:12:11 +02:00

Changed status from 'Open' to: 'Archived'

Aaron Carlisle closed this issue

2019-06-29 02:12:11 +02:00

Aaron Carlisle self-assigned this 2019-06-29 02:12:11 +02:00

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shadows dropping the frame-rate based on camera distance #34757