CGTalk - MR Glow problem

delavaca

09-11-2006, 11:30 AM

Hi,

I´m having a little headache with the MR glow, if somebody can help will be my life will be even better^^:)
I have a scene of a white room with a table and a paper on it. In the celling there is a lamp with an MR area spotlight (is the only light source). I added some glow to the inside part of the lamp, it looks very nice, It is made with a luminous material for the inside of the lamp and "GLARE" in the camera effects, rendered with FG and GI

The problem is that the paper on the table is also glowing. The lamp glows properly, just a bit with not a big aura just a little one. Tha paper is just a plane with a bitmap as texture, not any specular nor reflections, just a white bitmap with some pencil sketches.

I just want a normal paper, not some kind of magic glowing paper.

Thanks for your time

Rens

09-11-2006, 04:37 PM

I don't know which software you're using so I can't get into specifics but my guess is that you've set the lamp material to 255,255,255 self-illumination. One thing that might work is to somehow increase the brightness/intensity of the lamp's material and then lower the intensity of the glare. This will give you a glow only on the light and not on the paper.

The reason for this is that Glare works on the colour value of the pixel. The white of the paper you were describing might be close to 255,255,255 (RGB). Now if you set the self-illumination/luminosity of the light to plain white (255,255,255) then as far as Glare goes the paper and the light have the same brightness and will get the same amount of glow. So if you increase the value/brightness of the lamp, say, ten times then it will get much more glow. Now if you decrease Glare's intensity to the point where you can't see the glow on the paper anymore then you're in business.

JeffPatton

09-20-2006, 12:48 PM

Unfortunately there's no way to control the glare amount per object in Max with the glare tag settings (or ID, etc). So, I normally just hide everything except the items that I want the glare to be applied to, then render those items against a black background and composite that "glow pass" over the original render.

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