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Tag Archives: light pre pass
XNA: Adding fog to a LPP (or deferred) pipeline
Hi folks, After a long delay, here is one more gift for you: how to add fog to your scene. I will talk about global fog, although it can be easily extended to local fog volumes like spheres, cubes, etc. … Continue reading
Posted in XNA
Tagged HLSL, light pre pass, rendering, XNA, XNA fog deferred depth buffer light shadow
21 Comments
XNA Light Pre-Pass: Instancing
Almost anyone out there wants to output as many meshes/triangles/details as possible. We know that individual draw calls can hurt performance, so it would be nice if there was a way to draw lots of meshes using a single draw call. … Continue reading
XNA Light Pre-Pass: ambient light, SSAO and more
Hi folks, I’ve added a few improvements to the LPP renderer, to make it shine: ambient lighting using cubemaps, SSAO, an example of a dual-layer shader and some other small changes. Here is a screenshot: As usual, the full source … Continue reading
XNA Light Pre-Pass: culling, blending and particles
After the shortest Summer in my life, I’m back! Thanks to all who donated, I’m almost buying a Xbox360 with the money from this blog! This time I will release the feature that everybody was asking for: blending! I’m not … Continue reading
Posted in XNA
Tagged blending, culling, light pre pass, particles, shadow, transparency, XNA
23 Comments
XNA Light Pre-Pass: Skinned Meshes
Skinned animation is one of the most common animation techniques today (if not the most), so I couldn’t have left it out of this series. You can find more about it here. The main idea behind it is to store … Continue reading
XNA 4.0 Light Pre-Pass: casting shadows
It’s been a long time since my last post, but I didn’t give up on this blog. I was working really hard on a project aimed at DreamBuildPlay, but things didn’t go as I expected. It’s hard to keep everyone … Continue reading
XNA 4.0 Light Pre-Pass: shedding the light
After my last post, I decided to continue with the z-reconstruct approach and to use light-meshes where possible. I’ve implemented two more light types: directional and spot. You can get the source code here. Here is a screenshot of the … Continue reading
Posted in XNA
Tagged directional, HLSL, light pre pass, normal map, shader, sponza, spotlight
11 Comments
XNA 4.0 Light Pre-Pass: Optimization Round One
Following some suggestions on my previous posts, I decided to reconstruct the z-buffer from my linear depth buffer and optimize the lighting pass. To achieve this, I did the following steps: Changed the light-accumulation render target: now it has also … Continue reading
Reconstructing view-space position from depth
After my first LPP implementation, I decided to go for the mesh-based approach for rendering point lights. It consists in rendering a convex mesh (usually a sphere) that fits the light’s volume. This way we can use some depth/stencil tricks … Continue reading
XNA 4.0 Light Pre-Pass
Introduction The discussion between pros and cons of different techniques for real-time lighting has been running for years. Forward rendering, deferred shading and light pre-pass are some of the most famous techniques nowadays. Their definitions and variations can be found … Continue reading
