L_glass trouble

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  03 March 2005
L_glass trouble

Comrades, Iím having a bit of trouble getting some spots of absolute black out of my L_glass renders. Iím using 6.5, some FG, a little GI, and a caustic or two. Tried all kinds of different combinations of shader settings, environment maps, refraction depth, and countless toggles, sliders, and test renders; all too no avail. I noticed similar things came up in an older thread on the subject, but didnít see any solution. Someone please tell me it was user error and how I could fix it.



Thanks a bunch.



Peace.

Ps: how do you get some sweet colored shadows with this shader?

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File Type: jpg messed_up_pee_ball.jpg (24.7 KB, 154 views)
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if it's not raytraced, it's bullshit. -DETOX
 
  03 March 2005
Originally Posted by xDETOXx: Comrades, Iím having a bit of trouble getting some spots of absolute black out of my L_glass renders. Iím using 6.5, some FG, a little GI, and a caustic or two. Tried all kinds of different combinations of shader settings, environment maps, refraction depth, and countless toggles, sliders, and test renders; all too no avail. I noticed similar things came up in an older thread on the subject, but didnít see any solution. Someone please tell me it was user error and how I could fix it.



Thanks a bunch.



Peace.

Ps: how do you get some sweet colored shadows with this shader?



Looks like you have not enough refraction depth in your settings (renderglobals). These kind of objects need a LOT of ray depth to pass trough. If you set it already very high (like 100, just to see, dont forget to move the max depth too), so it's maybe a bug in the shader.

If a ray can't go trought the object it will return the environnement. If there is not environnement, it will return black (well, that's the behaviour with mib_dielectric, the base of l-glass). So put a environnement to avoid the problem.


For the colored shadow, I dont know if L-glass has a shadow support. If it's the case, just plug l glass in the shadow shader port of the shading group (will work only with raytrace and deep shadows, not shadow maps)

Last edited by Ze PilOt : 03 March 2005 at 01:30 PM.
 
  03 March 2005
That render had the samples set to 100, which seemed to me like a heck of a lot. When I upped it to 200, it fixed the problem; SWCHWEET! Sometimes I miss the most obvious things.



Thanks for the reply.
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if it's not raytraced, it's bullshit. -DETOX
 
  03 March 2005
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