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Spec map issue
Hey, polycount I got a question and it could possibly have a simple answer, I noticed when applying a spec map to a model it does not appear to display any highlights when using an ambient light under high quality only with other source of lights. Could just using an ambient light make the spec map ineffective? I have been… -
Re: Spec map issue
Im using Maya and plugged in the spec map in specular color. The model is a simple oil drum that I use to test things out, the spec map I made has a strong highlight so it can stand out when interacting with a source of light. I know that ambient light is used as a background light and usually you combine it with other… -
Re: Spec map issue
Ambient shouldn't prevent highlights. Are the lights making specular highlights when the Texture is removed? A screenshot of your spec settings, and the lit model, would help immensely. -
Re: Spec map issue
Yeah... Without IBL, you won't get specular from ambient light, because of what Xazas said. It doesn't have direction or position. The thing is a bit different with IBL, then you can have highlights in the ambient lighting, but actually that still not a "specular highlight" in the result, and it affects only the diffuse.… -
Re: Spec map issue
Difficult to tell without knowing what you are rendering with but "ambient" light normally means a light that is all around and does not have a specific source location or direction. Specular highlights are a directional reflection of your lightsource and therefor wont work with just ambient lighting because ambient lights… -
Re: Spec map issue
Yes, that's the function of an ambient light. To provide nice even shading from all angles, without any specular highlights. Think of it a bit like a sphere surrounding your model with light coming from all directions equally. So you'll need another type of light if you want the specular highlights to be evident. -
Re: Spec map issue
I thought it might be that but I was in doubt, I thought there was a chance I overlooked something. Thank you and everyone else it definitely put my doubts to rest. -
Re: Spec map issue
What is your software and shading context?
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