I started my first Cycles render but have some problems.
The scene consist just of a base plane, a cube of glass material and a meshLamp.
If I render (Integrator: Full Global Illumination) the result is not what I expected.
The glass is very dark. Even with 1000 render samples the are still lots of pixels visible.
In the render there are also disturbing pink dots.
What am I doing wrong?
Thanks for any help, the rendered image and the blend file I attached.
1000? i have dots after 16000+, it is feature of Monte carlo integrator, not bug. If photon fly to very rare path then it value multiplyed proportionally. There are always be some very rare paths, so hot random pixels.
Ok first change your Glass Shader’s IOR from 1.33 to 1.55 (more like real glass)
And your glass is simple cube (gives boring boring refraction, give it some bevels)
Second you are rendering with caustics (if you don’t know), and since your glass plate is totally square, there are no focus points for the caustics, causing them to fly allover, again giving you this dreadfull noise!
Moreover most of your objects have weird scale (read: weird is other than 1,1,1), this gives corrupt shading, so Ctrl+A apply scale.
thanks for reply, I did what you suggested but only get partial success.
(see attached image)
I changed IOR to 1.55, enabled ‘No caustics’ and applied scale to all objects.
The grainy looking has gone, but the glass is very very dark, darker then 1st example in prevoius post. How comes?
