Constant Clamp values above 1 ??

olivierth

Hi,

I've made a specular map for a beaten up character. The white color represents the blood, and the rest goes from black to mid grey.

Now, I need to change this map inside the material editor to have it control the "SpeculaPower". I need the black to be at a value of 2 and the white to be at around 30.

I tried passing it through a "ConstantClamp" but it feels like it cannot output anything above 1.

I've also tried with "Clamp" "Lerp"... nothing works.

Any idea?

Thank you!

engelmanna

Try multiplying the texture by 28, then add 2 to the result. You can then plug that result into the SpecularPower slot. That should give you a range from 2-30.

I've found this helpful with familiarizing yourself with the what each node does: http://udn.epicgames.com/Three/MaterialsCompendium.html

haiddasalami

Could lerp 2 and 28 by your gloss map as alpha

DeadlyFreeze

Ya the lerp should work fine, just be sure the alpha on the lerp is plugged into a single channel, use constants with your highest value set in A and the lowest in B.


I have to ask why you want it set so low? I mean if use a lerp the values aren't clamped, if you picked a value as low as 2 it's just going to be completely white (or what ever color your spec is) if any light is hitting it which is going to look pretty strange.

olivierth

Thanks! I must have done something wrong last time. It's working now.

I had already tried the Lerp node the same way you described but it did not work... oh well, now it does.

ambershee

FYI, the very definition of constant clamp is to lock the range to between 0 and 1.

LoTekK

ambershee wrote: »

FYI, the very definition of constant clamp is to lock the range to between 0 and 1.

That's not the meaning at all. Constant Clamp just defaults to 0-1. You can change up the min/max to whatever values you please.