Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] I need help! => Topic started by: Tok_Tok on 2020-05-18, 15:27:44

Title: Set lights to effect reflection ONLY
Post by: Tok_Tok on 2020-05-18, 15:27:44

Hello,

Is it possible to set a corona light to affect the reflection on an object only?

So it is possible to remove the reflection of a light and keep the diffuse but is it also possible to do it the other way around?

Thanks!

Title: Re: Set lights to effect reflection ONLY
Post by: TomG on 2020-05-18, 16:00:46

Not with a light - a light isn't a light if it doesn't cast light :)

But you can use a LightMtl on geometry, disable emit light, disable visible directly, and leave it visible in reflections and refractions.

Title: Re: Set lights to effect reflection ONLY
Post by: Tok_Tok on 2020-05-19, 09:06:22

Yes, that works. Thanks for the tip.

So if I get this right a Corona light isn't actual geometry so it can't be visible when turning off Reflections, but a Corona Light Material is applied to geometry so it CAN do this. As far as I can see the Corona Light Material has all the options a normal Corona light has but it's different in this one thing, why isn't there an option available to turn a Corona Light into geometry so it can only be visible for reflections? I'm asking because I do a lot of product visuals and I'm changing the light settings all the time, so having to pick a material with the material picker and the changing the settings is an annoying extra step which I have to do a lot of times.

Title: Re: Set lights to effect reflection ONLY
Post by: romullus on 2020-05-19, 09:34:21

You could use attribute holder and add Corona light material controls to geometry's command panel.

Title: Re: Set lights to effect reflection ONLY
Post by: Tok_Tok on 2020-05-19, 12:41:08

That can be a nice solution, I could just keep one light object in my Copitor and paste it whenever I need it, thanks.