window glass - direct lighting (gi diffuse)

[turtles123]

hello!

i want to render a room with a big window with glass, all the light comes from the sky. only problem is that if i use direct lighting specular materials (my window) blocks all the light.
how can i make my glass to let light pass?

i would really prefer to stay with direct lighting to have less render time.

thx!!

[aoktar]

alpha shadows. Avoid to use specular material in this kind of scenarios. Will generate lot of extra calculation. If so, make on "fake shadows". Use coherent ratio.
Also see resources in tutorials sections.

[turtles123]

alpha shadows. Avoid to use specular material in this kind of scenarios. Will generate lot of extra calculation. If so, make on "fake shadows". Use coherent ratio.
Also see resources in tutorials sections.

thx for the fast answer.

alpha shadow. "This setting allows any object with transparency (specular materials, materials with opacity settings and
alpha channels) to cast a proper shadow instead of behaving as a solid object."
this doesn't seem to help in this case.

i have played with fake shadows and coherent ratio but it doesn't help. light still doesn't pass

glossy gi diffuse.zip

(113.34 KiB) Downloaded 224 times

may be the scene file will help while i try to find something on the tutorials page...thx!

[FooZe]

See attached image.
Turn on alpha shadows and use the fake shadows option in the material settings.

[turtles123]

thx very much fooze!

i must have missed the double box to check in fake shadows inside material tab.

thx!!!