Sign in to follow this  
ehmdjii

how to make an object glow

Recommended Posts

hello, i was wondering how do you apply a colored glow effect to any object? what additional primitves are needed? where are they positioned? what textures do you apply to them? what blendmodes are used? thanks a lot!

Share this post


Link to post
Share on other sites
1) render what you want to glow into a texture (either the whole object or just a colour on black 'glow texture')
2) blur the texture, either use a shader, or you could down sample for a simple blur, or both
3) render the scene
4) render a fullscreen quad with the blur texture applied and additive blending enabled

EDIT:
use glBlendFunc(GL_ONE, GL_ONE) for additive blending.
Set quad alpha to 0 maybe?

[Edited by - JPulham on October 26, 2008 12:38:54 PM]

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

Sign in to follow this