Photometric light blocking sun/casting shadow - ART

[Anonymous]

I have a sun positioned through a window and then a rectangle photometric at that window to diffuse light throughout the room...like a portal.

But it appears the recetangle light is blocking the sun.  It is casting a shadow as if I have a plane there.

If I go to properties panel for the light I cannot uncheck "cast shadow".  If I uncheck "renderable" then the light doesn't work at all.

(the above is not to be confused with the "cast shadows" settings of the light itself.  I want the light to cast shadows in the scene.  I just don't want the shape of the light to block other lights.)

It seems there should be a simple fix to this but I'm not finding it.

[Anonymous]

@Anonymous 

TO be sure .. you put background image on plane on window and it's Preventing  sun rays....I am right ??

[Anonymous]

Exclude your plan from sun parameters

[Anonymous]

No the photometrick light that is in the window is preventing rays.  And it appears the sun positioner has no "exclude" option to exclude the photometric light from casting shadows.

[Anonymous]

I forgot to mention.  Your example is Vray.  I don't have Vray and I'm using Auto-Desk-Renderer  (ART).

[leeminardi · Accepted solution]

The  shadow cast by the photometric light is a function of the ART renderer.  In addition, you cannot exclude/include objects from lights with the ART renderer.  I suggest changing to a point shape or don't use ART.

Add your vote if you wish for ART improvements here:

https://forums.autodesk.com/t5/3ds-max-ideas/art-renderer-enhancements-visibility-light-exclusion/id...

[Anonymous]

Thanks for the response.  Wish it was better news.

Weird that a light blocks the light of another though.

- David