Questions tagged [hdr]

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How can I produce 3D environments for VR from HDRI images?

I have a question regarding to the HDRI maps as many some of you have a bit of experience in this field especially for Oculus Rift platform! I've been trying to achieve a 3D landscape from this HDRI ...
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1answer
146 views

HDR alpha blend

How do I blend two colors using SrcAlpha and OneMinusSrcAlpha when I have HDR range (rgb and a values can be > 1)? The typical formula for non-HDR is (src * srcAlpha) + (dst * (1.0 - srcAlpha)) but ...
2
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0answers
1k views

HDR bloom techniques using post processing in Unity3D

I've seen many posts on how to accomplish HDR bloom effects in Unity3D using its (now legacy) Bloom component as part of the standard assets package. I'm trying to replicate it using the new post ...
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2answers
400 views

Why is my Direct3D 9 floating point texture clamping values 0–1?

I'm using Direct3D 9 to draw some primitives into a texture. The format used at texture creation is D3DFMT_A16B16G16R16F, and the primitives are drawn using additive blending. The additive blending ...
2
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1answer
635 views

Opentk hdr rendering with framebuffer white screen problem

I am trying to do hdr rendering with two shader programs: one simply draws a hdr texture on a fullscreen quad and the other one does tonemapping. I am trying either linear tonemapping ...
9
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1answer
2k views

Tone mapping and eye adaptation - pale colors and darker image

I'm trying to implement tone mapping along with eye adaptation and HDR. Actually I implemented this already but I'm not satisfied with result and I think that I made something wrong. My final image (...
3
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2answers
805 views

Rectangular area light illuminance - colour banding

I'm currently working on an implementation of rectangular area lights but I am having some issues with the illuminance calculation, which gives me serious colour banding across the entire lit area. I'...
0
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1answer
594 views

Plot HDR tonemap curves

I am using a tonemapper in our project and a friend of mine asked if I could provide him with a plot of the tonemapper used (different functions are implemented). I tried in MATLAB to copy the tone-...
8
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1answer
381 views

Specular banding with high specular power

We're having some issues with our ray tracing in DirectX, especially with some serious banding issues with specular. With high specular power (above 8) banding starts. I'm wondering if this is an HDR/...
3
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2answers
3k views

Fast fullscreen quad rendering in Direct3D 11?

For the last few weeks, I've been trying to port a DX9 implementation of HDR rendering (tone mapping, bloom, stars, etc.) over to DX11. I believe I've got all features working but I'm not getting good ...
3
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1answer
381 views

Understanding and editing HDR light environments in Photoshop

I'm working with an in-development system that uses .hdr environments (equirectangular projection) to provide image-based lighting (IBL) to a 3D rendering. I'm ...
0
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1answer
68 views

Problem with .hdr/.pic format

So, everything was clear from the specification point of view, but when I moved to reading through some of the original implementations and reimplementations, I ran into this: ...
4
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1answer
9k views

How to set up bloom in Unity

Last time I used image effects in Unity it was back when 3.0 was released and for bloom you used the object's alpha to indicate whether it should glow or not. Now in 4.2 I couldn't grasp how to apply ...
3
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1answer
4k views

Uncharted 2 tone mapping and an eye adaptation

I found an example of uncharted 2 tone mapping on this site. Here is the code: ...
23
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1answer
8k views

Does HDR rendering have any benefits if bloom won't be applied?

At the moment I use an image based light in my game for environment lighting. I sample a sky cubemap to get diffuse and specular lighting. At the moment I use a HDR rendering pipeline - the skybox ...
2
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1answer
8k views

How to create HDR and bloom in Unity3D?

Unity3D's reference describes the HDR Bloom as: Using HDR allows for much more control in post processing. LDR bloom has an unfortunate side effect of blurring many areas of a scene even if ...
0
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1answer
6k views

Reinhard tone mapping and color space [closed]

I found two ways of doing tone mapping (first, second): ...
2
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1answer
2k views

HDR / Tone Mapping - choosing parameters

I implement HDR in my graphics engine (deferred rendering) based on this document: link I save a luminance in a texture (RGBA16F) this way: ...
33
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3answers
2k views

How do you author HDR content?

How do you make it easy for your artists to author content for an HDR renderer? What kinds of tools should you provide, and what workflows need to change, in going from LDR to HDR? Note that I'm not ...
17
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4answers
9k views

how does HDR work?

I'm trying to understand what HDR is and how it works. I understand the basic concepts and have an slight idea of how it is implemented with D3D/hlsl. However it's still pretty foggy. Say I'm ...