lightworks and translucency . . .

[__archiben]

is it possible to achieve a true translucency with lightworks? i.e. the light (and shadow) present on one face of the material is visible through on the other face of the material even if that material is opaque . . .

i've been playing around for what seems like an eternity and still can't achieve anything along those lines. i've googled in the desperate hope that someone out there my have some info on it, but all i've found is this from another applications troubleshooting pages:

another wrote:
... For instance, indoor lights will not shine through a glazed window and light up the ground outside. Similarly, light will not shine through a translucent lamp shade, even though you see through it. ...

now lightworks is obviously implemented to varying degrees of complexity in different applications, so i guess my question is: just what is the lightworks engine as implemented in archiCAD capable of? and if we are supposedly able to produce this kind of translucency, please can graphisoft provide us with some materials for the job.

~/archiben

[__archiben]

okay. it seems as though i'm getting somewhere if not exactly where i want to be . . . the trick appears to be turning the translucency values down rather than up, and boosting the diffuse.

a long way to go yet though . . .

~/archiben

[Dwight]

quick thoughts:

Start with dialling in transparency if you want light to shine through the glass - no refraction. add a little emission, perhaps, for that glowing look.... and there's always a fine screened white bitmap overlay like we did in the old days as an alternative.... or in addition - now it can be a transparency mask, too!

no mirror factor.

the "translucency" shader is not a light diffuser at all, just a dial-in of a peculiar back shadow reflection.

this is a material that needs the top render method.

Working on crystal and candle light exercise tonite. I will add your material request to my list in the long overdue book. post please your result, yes?

[__archiben]

Dwight wrote:
the "translucency" shader is not a light diffuser at all, just a dial-in of a peculiar back shadow reflection.

ah! probably why i've gone backwards in leaps and bounds since my last post then. didn't think of using emission and transparency - i've been trying to keep the transparency way down and hope that the shader can handle the diffusion. what do you mean by a 'peculiar back shadow reflection'?

this is a material that needs the top render method.

radiosity? so i need to fake it then? thought so . . .

post please your result, yes?

problem it is not master. posted in soon the fakiosity solution will be.

~/archiben

[Anonymous]

I have some frosted glass walls that I'd like to make translucent. I was told that you can adjust the Transmittance settings in the Materials Attributes settings, but it still doesn't seem to work. Can anyone help me with this?

Thanks,
S.

[__archiben]

same with me . . . i'm working on it and will post anything i come up with in the thread here:

http://archicad-talk.graphisoft.com/viewtopic.php?t=7097

~/archiben

[__archiben]

still failing miserably. although i have managed to make something that looks like polycarbonate . . . if you close one eye and squint a bit . . .

~/archiben

[__archiben]

more....

looks kinda funky but not really right. this one uses the transparency + emission idea, but i think i stuffed up refraction . . .

i don't want to 'see' the slab bulkhead or the columns as clearly as i do. but the people shadows are about what i want. could be softer.

~/archiben

[Dwight]

have you considered a second scrim behind the facade?

but you'll probably never get the differential od seeing the figures sharper than the back wall.....

[Andy Thomson]

Do you mean like this?