Grainy lighting

[Quan]

I just started working my way though the basics of using Leadwerks with BlitzMax and I noticed that my end result with the Lighting tutorial seems a bit Grainy:

 

 

I have a ATI 4870 using the 10.1 drivers. As far as I can tell I am not getting the same effect in the editor.

 

And this is the code I copied and pasted from the pdf file:

 

'Use the Leadwerks Engine module as our base 
Framework leadwerks.engine 

'Create an OpenGL graphics window 
Graphics 800,600

'Allows the engine to find files and load files from zip packages 
RegisterAbstractPath AppDir 

'Create a world 
If Not CreateWorld() RuntimeError "Failed to create world." 

'Create a camera 
cam:TCamera=CreateCamera() 
MoveEntity cam,Vec3(0,0,-5) 

'Create a visual mesh 
mesh:TMesh=CreateCube() 

'Create another mesh to cast a shadow on
ground:TMesh=CreateCube() 
ScaleMesh ground,Vec3(10,0.1,10) 
PositionEntity ground,Vec3(0,-2,0)

'Create a render buffer
buffer:TBuffer=CreateBuffer(800,600,BUFFER_COLOR0|BUFFER_DEPTH|BUFFER_NORMAL)

'Create a light

light:TLight=CreateSpotLight()
PositionEntity light,Vec3(2,2,-2) 
RotateEntity light,Vec3(45,45,0)

'Main loop 
While Not KeyHit(KEY_ESCAPE) 

TurnEntity mesh,Vec3(0.5)

'Update timing, physics, and other miscellaneous updates 
UpdateWorld 

'Make our render buffer the current buffer
SetBuffer buffer

'Draw the world 
RenderWorld 

'Make the back buffer the current buffer
SetBuffer BackBuffer()

'Call the RenderLights command, passing our buffer which contains 
'color, depth, and normal data
RenderLights(buffer)

'Swap the graphics buffers so we can see what we drew 

Flip 

Wend

 

Thanks

[Marleys Ghost]

You simply need to adjust SetShadowmapSize or SetShadowQuality or SetShadowOffset or play with a combination of them

 

Try simply adding after you create the light:

 

'Create a light

light:TLight=CreateSpotLight()
PositionEntity light,Vec3(2,2,-2) 
RotateEntity light,Vec3(45,45,0)

SetShadowmapSize(light, 512)

[Quan]

Cool that fixed it, Thanks.

 

Thought I might have set something up wrong

[Marleys Ghost]

Cool that fixed it, Thanks.

 

Thought I might have set something up wrong

 

 

No problems the other settings you can look up thier use HERE on the wiki pages. Sometimes it is simply a case of changing the default values.

[Josh]

This is called "shadow acne". If you look carefully, you can probably catch it in every game that uses shadow maps, at some point, to some degree.