LFS Development Discussion - Printable Version

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Scawen Wrote:
nacim Wrote:Did you converted all the textures to sRGB or do you convert to linear on the pixel shader?
I use D3DSAMP_SRGBTEXTURE so we can use standard sRGB textures without needing to convert them in the pixel shader. Then all the processing internally is linear and finally the output is converted to sRGB using D3DRS_SRGBWRITEENABLE.

nacim Wrote:Nice, I was waiting for this one for a long time! Will you still use vertex color to bake indirect lighting/ambient occlusion? I simply hope we don't loose indirect lighting, it would downgrade a lot the sense of depth on tracks.
Yes there is still an offline render for the ambient lighting, but now it is a single offline ambient render shared between all lighting configurations. For anyone who doesn't know what I am talking about, this is the thing mainly concerned with sky lighting, so for example you can have two different places that are not lit by the sun, but one of them might be a lot darker than another because the sky is obscured.

See in the attached images, the first two have all direct (sun) lighting switched off. The first one is simply default ambient lighting without the offline render. The second one has the offline ambient render applied. Finally the realtime direct lighting and shadows are applied in the third image.

NOTE: This is the original South City track with the old textures and no specular lighting added. This is simply a plain conversion of the old South City into the new system and Eric hasn't had a go at it yet.

denis-takumi Wrote:@Scawen, as I noticed, you say that the merging of the graphic code into the version with the new physics of tires is a nightmare for you. Why not in 2006 do not make version code with a branching, this would reduce your time to merge different versions of the game.
At the time, I believed the new tyre physics was about to be released and had done a significant amount of work in the new version. It was difficult to avoid clashes in the code because of the number of changes so I deleted the old code out, thinking it was finished other than any emergency patches.

If I had known at the time I would be going for over a decade with two versions, I would have taken a different approach.

lfsrm Wrote:But it's still a little bit problematic in case of night/day transition, as you cant use the indirect lightning in real time conditon ?

Yes, because the indirect lighting has "amount of sky visible" and "artificial light colour" stored separately. So the sky colour / brightness can be varied and the ambient lighting can vary in real time.

I have tried to design it to be able to handle changing lighting (day / night transition) although that is complicated and seems lower priority than the physics updates and a lot of other things I need to do and finish, so I don't know when that will appear.

lfsrm Wrote:Also is the new dynamic shadow also can be rendred inside the car interior ?

Yes, inside the cars too, cars do cast shadows on themselves.

Keiichi_Tsuchiya Wrote:Any plans on non directional sun light bounce?

Yes, there is also a component of ambient lighting contribution from light reflected on nearby objects.

The ambient vertex lighting consists of: sky light, artificial light, light from nearby objects.