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Hey guys,

I'm having a few problems with lighting a neon sign on Octane. I've got this scene and I keep getting really bad light leaks and fireflies everywhere. I'm using Direct Lighting and that seems to give me the best result. I've used a texture emission on the neon tubing to give the look but I dunno... maybe I'm missing something? Any help would be amazing.


Thanks.

Use PT and lower the GI clamp until you see an improvement, do you happens to have any texture in the emission slot of the material? also this is not real but turn of "shadow visibility" for the specular letters so they don't cast any shadows (this could be a big help)

Terryvfx wrote:Use PT and lower the GI clamp until you see an improvement, do you happens to have any texture in the emission slot of the material? also this is not real but turn of "shadow visibility" for the specular letters so they don't cast any shadows (this could be a big help)

Hey dude, thanks for the help. I've got an RGB Spectrum in the emission slot of the material, just to give it the colour I need. I'll definitely have a look at this. I'll repost when it's done.

Thanks

adeelk93 wrote:

Terryvfx wrote:Use PT and lower the GI clamp until you see an improvement, do you happens to have any texture in the emission slot of the material? also this is not real but turn of "shadow visibility" for the specular letters so they don't cast any shadows (this could be a big help)

Hey dude, thanks for the help. I've got an RGB Spectrum in the emission slot of the material, just to give it the colour I need. I'll definitely have a look at this. I'll repost when it's done.

Thanks

also do not use full colors or whiteness in materials 255 red or similar approaches causes fire flies.
That is all same with the textures.
Also if you use bump in transparent materials also (depending on the scene setup ) might cause fire flies.

Hey guys,

no matter what I do I can't seem to optimise those neon lights. I keep getting those fireflies and nothing seems to help that.
I've attached the scene file if anyone could have a look for me? I'd really appreciate it. I had to get rid of the brick texture at the back wall just cos the image was huge.


Thanks so much.

UPDATED FILE ATTACHED

I was curious about this sorry to hear you haven't made much progress, let me have a look at it.

DUDE! this scene is crazy I now see why Octane was giving you crazy stuff.

The neon tubes, they need to be properly modeled! you have intercepting geometry and more importantly the glass it's just one piece you need to have some thickness, going for cylinders it's a much better alternative. In the sweep for the neons you need to check "create single object" too, Octane was giving the material to three models instead of one and that means triple the number of lights in every instance.

Terryvfx wrote:DUDE! this scene is crazy I now see why Octane was giving you crazy stuff.

The neon tubes, they need to be properly modeled! you have intercepting geometry and more importantly the glass it's just one piece you need to have some thickness, going for cylinders it's a much better alternative. In the sweep for the neons you need to check "create single object" too, Octane was giving the material to three models instead of one and that means triple the number of lights in every instance.

Dude I can't thank you enough for the help! It's really been bugging me for a long time now. You wouldn't be able to send me the scene file would you? Just so I fully understand what you've done?

Thank you!

Hello dude so this is the scene file I was messing with, hope it helps, remember to model everything properly, glasses always need to have thickness unless it's a crystal ball or something like that.