Loading...
> >

Glowing nostrils.

SteveM17SteveM17 Posts: 987
in New Users

I'm sure I've seen this discussed before, but couldn't find it in the forum.

I have a close up of a face posed and lit with five lights, but when rendered the nostrils are almost glowing, how can I stop or lessen this?

Cheers.

Comments

  • BeeMKayBeeMKay Posts: 7,019

    Lower the translucency setting (I assume that you are u sing Iray render engine?), or dial down the light.

  • SteveM17SteveM17 Posts: 987

    I'm using 3Delight, when using Iray I've found it takes longer and gives pretty similar results. I messed around with the settings on the lights and got rid of the glowing.

  • jag11jag11 Posts: 885

    Looks like you need to change your light's Shadow Type to Ray Traced and play with Shadow Softness (start with 50%). Although you'll get longer render times with RayTracing in 3DL.

  • dracorndracorn Posts: 2,345

    Yeah, but at least you don't have to wait for it to create all the Deep Shadow Maps.  That drove me crazy before I switched to ray tracing.

  • Richard HaseltineRichard Haseltine Posts: 102,865

    Also check Shadow Bias - for a close-up you may well need to lower that (it's an offset, in cm, between sahdow and source to avoid mesh self-shadowing but it can cause issues in tight corners (or indeed with tights) if it is too high.

  • SteveM17SteveM17 Posts: 987

    Cheers for the info guys. Haven't used ray tracing for quite a while, so next time I'll give it a go.

  • mjc1016mjc1016 Posts: 15,001

    Raytraced shadows are now (actually have been for some time) the recommended shadow type for 3Delight.

    I did a test yesterday evening...using a light set for V4 that I've had forever, that uses deep shadow maps... 4 minutes 32 seconds to render.  Raytraced shadows 1 min 24 secs.  So, not only do they eliminate a long standing bug, they are now much faster.

  • SteveM17SteveM17 Posts: 987
    mjc1016 said:

    Raytraced shadows are now (actually have been for some time) the recommended shadow type for 3Delight.

    I did a test yesterday evening...using a light set for V4 that I've had forever, that uses deep shadow maps... 4 minutes 32 seconds to render.  Raytraced shadows 1 min 24 secs.  So, not only do they eliminate a long standing bug, they are now much faster.

    I've just tried a test myself, but for me the raytraced shadows take much longer than deep shadow maps. Is there something in the settings I should alter? (Also it says in the light tabs "Raytracing software only", I have no idea what that means)

  • SteveM17SteveM17 Posts: 987

    The test renders I did. The second one is raytraced and took much, much longer than the shadowmapped one, for very little difference.

    practice cz.jpg
    1854 x 1854 - 1M
    practice close up 2.jpg
    1854 x 1854 - 1M
  • SteveM17SteveM17 Posts: 987

    Oops, the first one is the raytraced one.

  • mjc1016mjc1016 Posts: 15,001

    What version of Stduio are you running?

  • jestmartjestmart Posts: 4,449
    edited April 2016

    That is not 'nostril glow', you have upward lighting so of course the inside of the nostrils are going to be lit.  You also have the bump setting on the Face surface too high.

    Post edited by jestmart on
  • SteveM17SteveM17 Posts: 987

    I'm using 4.8.

    I'd expect the nostrils to be lit, but before I changed the light settings they were far brighter than all the other skin.

  • mjc1016mjc1016 Posts: 15,001

    Enable Progressive Mode...that turns on the 'raytrace hider' (3DL speak for the raytracing specific renderer)....that should give a 3x to 6x speed boost to raytraced operations (and at least a noticeable boost overall).

  • SteveM17SteveM17 Posts: 987
    mjc1016 said:

    Enable Progressive Mode...that turns on the 'raytrace hider' (3DL speak for the raytracing specific renderer)....that should give a 3x to 6x speed boost to raytraced operations (and at least a noticeable boost overall).

    Thanks, I'll give that a try tomorrow.

  • SteveM17SteveM17 Posts: 987

    I turned on Progressive Mode and rendered using raytraced shadows and it was certainly faster than last time. However, it was still about twenty minutes longer than shadow mapped. Are there any other settings I should look at to speed it up?

  • prixatprixat Posts: 1,590

    Check the render settings for 'ray depth' (I forget the exact name).

    For your 'simple' scene you can get away with only 1 bounce.
    Every time you re-install or update Studio it has the annoying habit of re-setting this to a very high 6 or 7!

  • Roman_K2Roman_K2 Posts: 1,253

    What is a "deep shadow map", again?

  • mjc1016mjc1016 Posts: 15,001

    Here's the Pixar definition...

    https://renderman.pixar.com/view/deep-shadow-maps

    3Delight's definition/feature set is very similar (couldn't find a nicely worded version).

Sign In or Register to comment.