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Question by Bolbo13 · Jan 08, 2015 at 03:04 PM · alphahdrparticle-system

Alpha blending + HDR problem

Hi, I have a particle system in my scene with a particles->alpha blended shader. If camera has hdr OFF, the render is just fine, if it's ON, the colors of the particles are all wrong. Here is a screen from the scene (rendered right) : img1

And here is a screen from the game camera (with HDR, messed up colors) : img2

I'd rather have the HDR option and render alpha blended particles correctly. Is this possible ?

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Answer by punk · Jan 21, 2015 at 04:57 AM

I just had this problem also, I fixed it by editing the shader and after this line

fixed4 col = 2.0f i.color _TintColor * tex2D(_MainTex, i.texcoord);

I added col = clamp(col, 0 ,1);

something to do with the col values wrapping into negatives

Taz

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avatar image Bolbo13 · Jan 23, 2015 at 06:14 PM 0
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That fixed the problem. In the Alpha blended shader, the line :

return 2.0f i.color TintColor * tex2D($$anonymous$$ainTex, i.texcoord);

Became :

fixed4 col = 2.0f i.color TintColor * tex2D($$anonymous$$ainTex, i.texcoord);

col = clamp(col, 0, 1);

return col;

Thanks Taz.

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