#if CLOUD_UNBOUND_SIZE_MULT != 100 #define CLOUD_UNBOUND_SIZE_MULT_M CLOUD_UNBOUND_SIZE_MULT * 0.01 #endif #if CLOUD_QUALITY == 1 const float cloudStretchRaw = 11.0; #elif CLOUD_QUALITY == 2 const float cloudStretchRaw = 16.0; #elif CLOUD_QUALITY == 3 const float cloudStretchRaw = 18.0; #endif #if CLOUD_UNBOUND_SIZE_MULT <= 100 const float cloudStretch = cloudStretchRaw; #else const float cloudStretch = cloudStretchRaw / float(CLOUD_UNBOUND_SIZE_MULT_M); #endif const float cloudHeight = cloudStretch * 2.0; float Noise3D(vec3 p) { p.z = fract(p.z) * 128.0; float iz = floor(p.z); float fz = fract(p.z); vec2 a_off = vec2(23.0, 29.0) * (iz) / 128.0; vec2 b_off = vec2(23.0, 29.0) * (iz + 1.0) / 128.0; float a = texture2D(noisetex, p.xy + a_off).r; float b = texture2D(noisetex, p.xy + b_off).r; return mix(a, b, fz); } float GetCloudNoise(vec3 tracePos, int cloudAltitude, float lTracePosXZ, float cloudPlayerPosY) { vec3 tracePosM = tracePos.xyz * 0.00016; float wind = 0.0006; float noise = 0.0; float currentPersist = 1.0; float total = 0.0; #if CLOUD_SPEED_MULT == 100 #define CLOUD_SPEED_MULT_M CLOUD_SPEED_MULT * 0.01 wind *= syncedTime; #else #define CLOUD_SPEED_MULT_M CLOUD_SPEED_MULT * 0.01 wind *= frameTimeCounter * CLOUD_SPEED_MULT_M; #endif #if CLOUD_UNBOUND_SIZE_MULT != 100 tracePosM *= CLOUD_UNBOUND_SIZE_MULT_M; wind *= CLOUD_UNBOUND_SIZE_MULT_M; #endif #if CLOUD_QUALITY == 1 int sampleCount = 2; float persistance = 0.6; float noiseMult = 0.95; tracePosM *= 0.5; wind *= 0.5; #elif CLOUD_QUALITY == 2 int sampleCount = 4; float persistance = 0.5; float noiseMult = 1.07; #elif CLOUD_QUALITY == 3 int sampleCount = 4; float persistance = 0.5; float noiseMult = 1.0; #endif for (int i = 0; i < sampleCount; i++) { #if CLOUD_QUALITY >= 2 noise += Noise3D(tracePosM + vec3(wind, 0.0, 0.0)) * currentPersist; #else noise += texture2D(noisetex, tracePosM.xz + vec2(wind, 0.0)).b * currentPersist; #endif total += currentPersist; tracePosM *= 3.0; wind *= 0.5; currentPersist *= persistance; } noise = pow2(noise / total); noiseMult *= 0.65 + 0.01 * sqrt(lTracePosXZ + 10.0) // more clouds far away + 0.1 * clamp01(-cloudPlayerPosY / cloudHeight) // more clouds when camera is above them + 0.4 * rainFactor; // more clouds during rain noise *= noiseMult * CLOUD_UNBOUND_AMOUNT; float threshold = clamp(abs(cloudAltitude - tracePos.y) / cloudStretch, 0.001, 0.999); threshold = pow2(pow2(pow2(threshold))); return noise - (threshold * 0.2 + 0.25); } vec4 GetVolumetricClouds(int cloudAltitude, float distanceThreshold, inout float cloudLinearDepth, float skyFade, float skyMult0, vec3 nPlayerPos, float lViewPosM, float VdotS, float VdotU, float dither) { vec4 volumetricClouds = vec4(0.0); float higherPlaneAltitude = cloudAltitude + cloudStretch; float lowerPlaneAltitude = cloudAltitude - cloudStretch; float lowerPlaneDistance = (lowerPlaneAltitude - cameraPosition.y) / nPlayerPos.y; float higherPlaneDistance = (higherPlaneAltitude - cameraPosition.y) / nPlayerPos.y; float minPlaneDistance = min(lowerPlaneDistance, higherPlaneDistance); minPlaneDistance = max(minPlaneDistance, 0.0); float maxPlaneDistance = max(lowerPlaneDistance, higherPlaneDistance); if (maxPlaneDistance < 0.0) return vec4(0.0); float planeDistanceDif = maxPlaneDistance - minPlaneDistance; #if CLOUD_QUALITY == 1 float stepMult = 16.0; #elif CLOUD_QUALITY == 2 float stepMult = 24.0; #elif CLOUD_QUALITY == 3 float stepMult = 16.0; #endif #if CLOUD_UNBOUND_SIZE_MULT > 100 stepMult = stepMult / sqrt(float(CLOUD_UNBOUND_SIZE_MULT_M)); #endif int sampleCount = int(planeDistanceDif / stepMult + dither + 1); vec3 traceAdd = nPlayerPos * stepMult; vec3 tracePos = cameraPosition + minPlaneDistance * nPlayerPos; tracePos += traceAdd * dither; tracePos.y -= traceAdd.y; float firstHitPos = 0.0; float VdotSM1 = max0(sunVisibility > 0.5 ? VdotS : - VdotS); float VdotSM1M = VdotSM1 * invRainFactor; float VdotSM2 = pow2(VdotSM1) * abs(sunVisibility - 0.5) * 2.0; float VdotSM3 = VdotSM2 * (2.5 + rainFactor) + 1.5 * rainFactor; for (int i = 0; i < sampleCount; i++) { tracePos += traceAdd; if (abs(tracePos.y - cloudAltitude) > cloudStretch) break; vec3 cloudPlayerPos = tracePos - cameraPosition; float lTracePos = length(cloudPlayerPos); float lTracePosXZ = length(cloudPlayerPos.xz); float cloudMult = 1.0; if (lTracePosXZ > distanceThreshold) break; if (lTracePos > lViewPosM) { if (skyFade < 0.7) continue; else cloudMult = skyMult0; } float cloudNoise = GetCloudNoise(tracePos, cloudAltitude, lTracePosXZ, cloudPlayerPos.y); if (cloudNoise > 0.00001) { #if defined CLOUD_CLOSED_AREA_CHECK && defined REALTIME_SHADOWS if (GetShadowOnCloud(tracePos, cloudAltitude, lowerPlaneAltitude, higherPlaneAltitude)) { if (eyeBrightness.y != 240) continue; } #endif if (firstHitPos < 1.0) { firstHitPos = lTracePos; #if CLOUD_QUALITY == 1 tracePos.y += 4.0 * (texture2D(noisetex, tracePos.xz * 0.001).r - 0.5); #endif } float opacityFactor = min1(cloudNoise * 8.0); float cloudShading = 1.0 - (higherPlaneAltitude - tracePos.y) / cloudHeight; cloudShading *= 1.0 + 0.75 * VdotSM3 * (1.0 - opacityFactor); vec3 colorSample = cloudAmbientColor * (0.7 + 0.3 * cloudShading) + cloudLightColor * cloudShading; //vec3 colorSample = 2.5 * cloudLightColor * pow2(cloudShading); // <-- Used this to take the Unbound logo vec3 cloudSkyColor = GetSky(VdotU, VdotS, dither, true, false); float cloudFogFactor = clamp((distanceThreshold - lTracePosXZ) / distanceThreshold, 0.0, 0.8) * 1.25; float skyMult1 = 1.0 - 0.2 * (1.0 - skyFade) * max(sunVisibility2, nightFactor); float skyMult2 = 1.0 - 0.33333 * skyFade; colorSample = mix(cloudSkyColor, colorSample * skyMult1, cloudFogFactor * skyMult2 * 0.72); colorSample *= pow2(1.0 - max(blindness, darknessFactor)); volumetricClouds.rgb = mix(volumetricClouds.rgb, colorSample, 1.0 - min1(volumetricClouds.a)); volumetricClouds.a += opacityFactor * pow(cloudFogFactor, 0.5 + 10.0 * pow(abs(VdotSM1M), 90.0)) * cloudMult; if (volumetricClouds.a > 0.9) { volumetricClouds.a = 1.0; break; } } } if (volumetricClouds.a > 0.5) cloudLinearDepth = sqrt(firstHitPos / far); return volumetricClouds; }