Hi guys, I’m new on BBL, I have 2 questions if someone have clues it will be really appreciated！
1, in UE4 all the colors I can adjust are HSV, which if I set a very high value for the V component than I’ll get a very bright area in the final output, I’m wondering is there similar option or workflow in BBL? because use V to control the light intensity is really convenience!
2, in UE4’s material editor the customized shader code are finally connected to the PBR slots, for example
float s = sin(iTime * n) + 1.;
// and this ‘s’ variable will be connected to the ‘emissiveColor’ slot to get a blink effect.
what is the right way to do this in BBL? should I use a dynamicTexture to draw things dynamiclly and set for pbr.emissiveTexture? but I think this way I can’t use shader code…
or I should combination all the exist PBR shader code with my own code to generate a complete new shader material? but this way I think it’s a bit complex and a lot work to do…
For 1: Do you want to change the exposure of the scene or just update a color using HSV? If it is the latter Color3 has this method: Color3 - Babylon.js Documentation
thanks for replying, yes I want to change the exposure of a mesh’s material (so that it will be more bright if bloom is enabled)
for example if I need to create a light ball in UE4:
1, sphere mesh + customize PBR material
2, in material editor, use unlit mode for the material (or other whatever modes as long as the emissive slot is available)
3, create vec3 -> connect to emssive slot
4, change V compoent of the vec3, you will get a light ball
the color components in UE4 can be exceeded from 1, personally I think the larger part will be considered as the exposure value of this material in the bloom shader to find bright area?
anyway this workflow is really really convenience.
Hello, we are visiting this topic. The question I have regarding this is can we have the shader exposure value only affect the input texture for the bloom effect and not effect the rendered model? Would be have to essentially render two passes then, one for the base render and then an image to hand off to the bloom effect?
